變更 Cassandra 壓縮策略

Apigee 使用 Cassandra 資料庫儲存大部分的資料，包括 Proxy、快取和權杖的資料。「精簡」是縮減資料庫中儲存的資料大小的標準程序，如要維持資料庫的運作效率，極為重要。Cassandra 支援多種壓縮策略。Apigee 建議針對所有資料欄系列，所有 Edge for Private Cloud 客戶以 LeveledCompactionStrategy 策略執行 Cassandra 叢集，而非使用預設策略 SizeTieredCompactionStrategy。LeveledCompactionStrategy 與 SizedTieredCompactionStrategy 相比，提供更好的效能、磁碟使用率更高、更有效率的壓縮功能，而且可用空間更少。

所有新的 Apigee 4.51.00 以上版本安裝都會自動使用 LeveledCompactionStrategy 設定 Cassandra。不過，如果您使用的是舊版 Apigee，或是已從舊版本升級至 Apigee 4.51.00，您的版本可能仍在搭配 SizeTieredCompactionStrategy 使用 Cassandra。如要找出 Cassandra 版本使用的壓縮策略，請參閱「檢查壓縮策略」一節。

本頁面說明如何將壓縮策略變更為 LeveledCompactionStrategy。

準備

查看現有的密集策略

如要查看資料欄系列現有的壓縮策略，請按照「檢查壓縮策略」一文的說明操作。如果壓縮策略已是 LeveledCompactionStrategy，則您不需要按照本頁其餘指示操作。

備份

因為變更壓縮策略會在 C* 節點中觸發完整的密集週期。這可能會因為壓縮負載和同時的應用程式流量造成一些延遲時間。您可能需要復原這項變更，才能從備份還原 Cassandra 節點。請參閱如何備份一文，瞭解如何在變更壓縮策略前備份資料。

壓縮處理量

將壓縮策略變更為 LeveledCompactionStrategy 後，壓縮可能會長時間執行。執行階段會因資料壓縮的大小而異。在壓縮週期內，Cassandra 可能會佔用更多系統資源。為確保壓縮不會佔用大量系統資源，導致 API 執行階段要求中斷，建議您設定壓縮處理量限制。

在每個節點上執行以下 nodetool 指令，將所有 C* 節點的壓縮處理量設為最大為 128 MB：

nodetool setcompactionthroughput 128

調整 VM 大小

執行這項變更之前，請確保 C* 節點具備充足的 CPU/記憶體資源。執行這項變更前，請確認沒有任何 C* 節點運作 CPU 負載的 25% 以上。

變更密集策略後，應執行完整的密集週期，因此建議在低流量期間變更壓縮策略。

分段執行作業

您可能無法在一天內完成所有節點的變更，特別是當您操作大型 Cassandra 叢集時，每個節點需要逐一重新建構索引。您可以針對單一結構定義或一個資料欄系列 (資料表) 變更壓縮策略。針對這種情況，請修改資料欄系列以變更其壓縮策略，然後在所有節點上重新建立資料表中的所有索引 (如有)。接著，針對每個資料表或索引鍵空間重複上述步驟。您可以對一個資料表執行這類執行作業，也可以將某個索引鍵空間細分為在不同日期執行。

舉例來說，如要變更 kms 結構定義中 oauth_20_access_tokens 資料欄系列的壓縮策略，您可以執行以下操作：

  1. 變更表格以變更壓縮策略： 
       
ALTER TABLE kms.oauth_20_access_tokens WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  2. 僅重新建構這個資料表的所有索引： 
    nodetool rebuild_index kms oauth_20_access_tokens oauth_20_access_tokens_app_id_idx
nodetool rebuild_index kms oauth_20_access_tokens oauth_20_access_tokens_client_id_idx
nodetool rebuild_index kms oauth_20_access_tokens oauth_20_access_tokens_refresh_token_idx

變更密集策略

整體來說，改變壓縮策略是兩個步驟：

  1. 修改每個表格的壓縮策略。
  2. 逐一重新建立每個節點的所有索引。

調整表格來設定新的密集策略

對任何 Cassandra 節點執行下列 Cassandra Query Language (CQL) 指令，一次變更一個索引鍵空間的策略。您可以在 cql 提示中執行 CQL。如要叫用 cql 提示：

/opt/apigee/apigee-cassandra/bin/cqlsh `hostname -i`

畫面會顯示類似以下的回應：

Connected to apigee at XX.XX.XX.XX:9042.
[cqlsh 5.0.1 | Cassandra 2.1.16 | CQL spec 3.2.1 | Native
protocol v3]
Use HELP for help.
cqlsh>

執行下列 CQL 以變更壓縮策略：

  • 負責變更鍵空間 kms 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE kms.organizations WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE kms.maps WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE kms.apps WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE kms.app_credentials WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE kms.api_products WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE kms.apiproducts_appslist WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE kms.api_resources WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE kms.app_end_user WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE kms.oauth_20_authorization_codes WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE kms.oauth_20_access_tokens WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE kms.oauth_10_request_tokens WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE kms.oauth_10_access_tokens WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE kms.oauth_10_verifiers WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE kms.app_enduser_tokens WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 負責變更鍵空間 user_settings 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE user_settings.user_settings WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 負責變更鍵空間 keyvaluemap 壓縮策略的每位有效待開發行銷對象： 
       
ALTER TABLE keyvaluemap.keyvaluemaps_r21 WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 用來變更鍵空間 devconnect 壓縮策略的每位有效待開發客戶： 
        
ALTER TABLE devconnect.developers WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE devconnect.companies WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE devconnect.company_developers WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 負責變更鍵空間 counter 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE counter.counters_current_version WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE counter.counters_with_expiry WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE counter.counters WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE counter.key_timestamp_count WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE counter.timestamp_key WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE counter.period_timestamp WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE counter.gateway_quota WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 負責變更鍵空間 cache 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE cache.cache_entries WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE cache.cache_sequence_id_r24 WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 負責變更鍵空間 ax_custom_report_model 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE ax_custom_report_model.report_description WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE ax_custom_report_model.report_id_lookup WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE ax_custom_report_model.org_metadata WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE ax_custom_report_model.org_report_lookup WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE ax_custom_report_model.report_created_view WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE ax_custom_report_model.report_viewed_view WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 負責變更鍵空間 auth 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE auth.totp WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 負責變更鍵空間 audit 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE audit.audits WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE audit.audits_ref WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 負責變更鍵空間 apprepo 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE apprepo.organizations WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apprepo.environments WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apprepo.apiproxies WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apprepo.apiproxy_revisions WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apprepo.api_proxy_revisions_r21 WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 負責變更鍵空間 apimodel 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE apimodel.apis WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apimodel.apis_revision WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apimodel.resource WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apimodel.method WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apimodel.revision_counters WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apimodel.template_counters WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apimodel.template WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apimodel.credentials WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apimodel.credentialsv2 WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apimodel.schemas WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apimodel.security WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE apimodel.template_auth WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 負責變更鍵空間 identityzone 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE identityzone.IdentityZones WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE identityzone.OrgToIdentityZone WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 負責變更鍵空間 dek 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE dek.keys WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 負責變更鍵空間 analytics 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE analytics.custom_aggregates_defn WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE analytics.custom_rules_defn WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE analytics.custom_aggregates_defn_updates WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE analytics.custom_rules_defn_updates WITH compaction = {'class' : 'LeveledCompactionStrategy'};

重新建構索引

您需要在調整密集策略後執行這個步驟。逐一在各個 Cassandra 節點上逐一執行以下 nodetool 指令。

執行下列 nodetool 指令來重新建構索引：

  • 重新建構索引鍵空間 kms 的索引：
    nodetool rebuild_index kms maps maps_organization_name_idx
nodetool rebuild_index kms apps apps_app_family_idx
nodetool rebuild_index kms apps apps_app_id_idx
nodetool rebuild_index kms apps apps_app_type_idx
nodetool rebuild_index kms apps apps_name_idx
nodetool rebuild_index kms apps apps_organization_name_idx
nodetool rebuild_index kms apps apps_parent_id_idx
nodetool rebuild_index kms apps apps_parent_status_idx
nodetool rebuild_index kms apps apps_status_idx
nodetool rebuild_index kms app_credentials app_credentials_api_products_idx
nodetool rebuild_index kms app_credentials app_credentials_organization_app_id_idx
nodetool rebuild_index kms app_credentials app_credentials_organization_name_idx
nodetool rebuild_index kms api_products api_products_organization_name_idx
nodetool rebuild_index kms app_end_user app_end_user_app_id_idx
nodetool rebuild_index kms oauth_20_authorization_codes oauth_20_authorization_codes_client_id_idx
nodetool rebuild_index kms oauth_20_authorization_codes oauth_20_authorization_codes_organization_name_idx
nodetool rebuild_index kms oauth_20_access_tokens oauth_20_access_tokens_app_id_idx
nodetool rebuild_index kms oauth_20_access_tokens oauth_20_access_tokens_client_id_idx
nodetool rebuild_index kms oauth_20_access_tokens oauth_20_access_tokens_refresh_token_idx
nodetool rebuild_index kms oauth_10_request_tokens oauth_10_request_tokens_consumer_key_idx
nodetool rebuild_index kms oauth_10_request_tokens oauth_10_request_tokens_organization_name_idx
nodetool rebuild_index kms oauth_10_access_tokens oauth_10_access_tokens_app_id_idx
nodetool rebuild_index kms oauth_10_access_tokens oauth_10_access_tokens_consumer_key_idx
nodetool rebuild_index kms oauth_10_access_tokens oauth_10_access_tokens_organization_name_idx
nodetool rebuild_index kms oauth_10_access_tokens oauth_10_access_tokens_status_idx
nodetool rebuild_index kms oauth_10_verifiers oauth_10_verifiers_organization_name_idx
nodetool rebuild_index kms oauth_10_verifiers oauth_10_verifiers_request_token_idx
  • 重新建構索引鍵空間 devconnect 的索引：
    nodetool rebuild_index devconnect companies companies_name_idx
nodetool rebuild_index devconnect companies companies_organization_name_idx
nodetool rebuild_index devconnect companies companies_status_idx
nodetool rebuild_index devconnect company_developers company_developers_company_name_idx
nodetool rebuild_index devconnect company_developers company_developers_developer_email_idx
nodetool rebuild_index devconnect company_developers company_developers_organization_name_idx
nodetool rebuild_index devconnect developers developers_email_idx
nodetool rebuild_index devconnect developers developers_organization_name_idx
nodetool rebuild_index devconnect developers developers_status_idx
  • 重新建構索引鍵空間 cache 的索引：
        
nodetool rebuild_index cache cache_entries cache_entries_cache_name_idx
  • 重新建構索引鍵空間 audit 的索引：
    nodetool rebuild_index audit audits audits_operation_idx
nodetool rebuild_index audit audits audits_requesturi_idx
nodetool rebuild_index audit audits audits_responsecode_idx
nodetool rebuild_index audit audits audits_timestamp_idx
nodetool rebuild_index audit audits audits_user_idx
  • 重新建構索引鍵空間 apprepo 的索引：
    nodetool rebuild_index apprepo environments environments_organization_name_idx
  • 重新建構索引鍵空間 apimodel 的索引：
    nodetool rebuild_index apimodel apis a_name
nodetool rebuild_index apimodel apis a_org_name
nodetool rebuild_index apimodel apis_revision ar_a_name
nodetool rebuild_index apimodel apis_revision ar_a_uuid
nodetool rebuild_index apimodel apis_revision ar_base_url
nodetool rebuild_index apimodel apis_revision ar_is_active
nodetool rebuild_index apimodel apis_revision ar_is_latest
nodetool rebuild_index apimodel apis_revision ar_org_name
nodetool rebuild_index apimodel apis_revision ar_rel_ver
nodetool rebuild_index apimodel apis_revision ar_rev_num
nodetool rebuild_index apimodel resource r_a_name
nodetool rebuild_index apimodel resource r_api_uuid
nodetool rebuild_index apimodel resource r_ar_uuid
nodetool rebuild_index apimodel resource r_base_url
nodetool rebuild_index apimodel resource r_name
nodetool rebuild_index apimodel resource r_org_name
nodetool rebuild_index apimodel resource r_res_path
nodetool rebuild_index apimodel resource r_rev_num
nodetool rebuild_index apimodel method m_a_name
nodetool rebuild_index apimodel method m_api_uuid
nodetool rebuild_index apimodel method m_ar_uuid
nodetool rebuild_index apimodel method m_base_url
nodetool rebuild_index apimodel method m_name
nodetool rebuild_index apimodel method m_org_name
nodetool rebuild_index apimodel method m_r_name
nodetool rebuild_index apimodel method m_r_uuid
nodetool rebuild_index apimodel method m_res_path
nodetool rebuild_index apimodel method m_rev_num
nodetool rebuild_index apimodel method m_verb
nodetool rebuild_index apimodel template t_a_name
nodetool rebuild_index apimodel template t_a_uuid
nodetool rebuild_index apimodel template t_entity
nodetool rebuild_index apimodel template t_name
nodetool rebuild_index apimodel template t_org_name
nodetool rebuild_index apimodel schemas s_api_uuid
nodetool rebuild_index apimodel schemas s_ar_uuid
nodetool rebuild_index apimodel security sa_api_uuid
nodetool rebuild_index apimodel security sa_ar_uuid
nodetool rebuild_index apimodel template_auth au_api_uuid
  • 重新建構索引鍵空間 dek 的索引：
    nodetool rebuild_index dek keys usecase_index

驗證

  1. 按照檢查壓縮策略中的操作說明，檢查結構定義的壓縮策略變更是否已生效。
  2. 確認小工具已成功執行，且策略變更後，資料會經過壓縮：
    1. 在每個 cassandra 節點上執行下列 nodetool 指令，確認所有壓縮是否均已完成，且沒有任何待處理項目：
      nodetool compactionstats
    2. 使用上述指令進行驗證，確定沒有任何壓縮處於待處理狀態後，請檢查資料檔案的上次修改時間戳記 (位於 /opt/apigee/data/apigee-cassandra/data/)，到執行壓縮策略變更 CQL 時的時間戳記之後。

復原

如要復原，請採取下列其中一種做法：

方法 1：還原變更

將密集策略復原為 SizeTieredCompactionStrategy。

針對一個鍵空間的任何 Cassandra 節點變更策略，一次執行下列 CQL。您可以在 cql 提示中執行 CQL。如要叫用 cql 提示：

/opt/apigee/apigee-cassandra/bin/cqlsh `hostname -i`

畫面會顯示類似以下的回應：

Connected to apigee at XX.XX.XX.XX:9042.
[cqlsh 5.0.1 | Cassandra 2.1.16 | CQL spec 3.2.1 | Native
protocol v3]
Use HELP for help.
cqlsh>

執行下列 CQL 以變更壓縮策略：

  • 負責變更鍵空間 kms 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE kms.organizations WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE kms.maps WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE kms.apps WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE kms.app_credentials WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE kms.api_products WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE kms.apiproducts_appslist WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE kms.api_resources WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE kms.app_end_user WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE kms.oauth_20_authorization_codes WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE kms.oauth_20_access_tokens WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE kms.oauth_10_request_tokens WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE kms.oauth_10_access_tokens WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE kms.oauth_10_verifiers WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE kms.app_enduser_tokens WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 負責變更鍵空間 user_settings 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE user_settings.user_settings WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 負責變更鍵空間 keyvaluemap 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE keyvaluemap.keyvaluemaps_r21 WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 負責變更鍵空間 devconnect 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE devconnect.developers WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE devconnect.companies WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE devconnect.company_developers WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 負責變更鍵空間 counter 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE counter.counters_current_version WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE counter.counters_with_expiry WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE counter.counters WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE counter.key_timestamp_count WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE counter.timestamp_key WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE counter.period_timestamp WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE counter.gateway_quota WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 負責變更鍵空間 cache 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE cache.cache_entries WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE cache.cache_sequence_id_r24 WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 負責變更鍵空間 ax_custom_report_model 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE ax_custom_report_model.report_description WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE ax_custom_report_model.report_id_lookup WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE ax_custom_report_model.org_metadata WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE ax_custom_report_model.org_report_lookup WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE ax_custom_report_model.report_created_view WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE ax_custom_report_model.report_viewed_view WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 負責變更鍵空間 auth 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE auth.totp WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 負責變更鍵空間 audit 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE audit.audits WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE audit.audits_ref WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 負責變更鍵空間 apprepo 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE apprepo.organizations WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apprepo.environments WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apprepo.apiproxies WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apprepo.apiproxy_revisions WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apprepo.api_proxy_revisions_r21 WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 負責變更鍵空間 apimodel 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE apimodel.apis WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apimodel.apis_revision WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apimodel.resource WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apimodel.method WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apimodel.revision_counters WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apimodel.template_counters WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apimodel.template WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apimodel.credentials WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apimodel.credentialsv2 WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apimodel.schemas WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apimodel.security WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE apimodel.template_auth WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 負責變更鍵空間 identityzone 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE identityzone.IdentityZones WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE identityzone.OrgToIdentityZone WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 負責變更鍵空間 dek 壓縮策略的每位有效待開發行銷對象： 
        
ALTER TABLE dek.keys WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 負責變更鍵空間 analytics 壓縮策略的每位有效待開發行銷對象： 
    ALTER TABLE analytics.custom_aggregates_defn WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE analytics.custom_rules_defn WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE analytics.custom_aggregates_defn_updates WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE analytics.custom_rules_defn_updates WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};

變更所有資料欄系列後，如果您在將壓縮策略變更為 LeveledCompactionStrategy 時已重新建立索引，就必須重新建構索引。和先前重新建構所有索引的步驟相同。如果您之前沒有重新建構索引，則不需要在復原期間重新建構索引。

選項 2：從備份還原完整資料

如要執行完整資料還原作業，請參閱從備份還原中的操作說明。

查看壓縮策略

在 Cassandra 中，精簡策略是在資料欄系列 (資料表) 層級設定。您可以使用下方的 CQL 查詢，查看每個資料欄系列的壓縮策略。

您可以在 cql 提示中執行 CQL。如要叫用 cql 提示：

/opt/apigee/apigee-cassandra/bin/cqlsh `hostname -i`

畫面會顯示類似以下的回應：

Connected to apigee at XX.XX.XX.XX:9042.
[cqlsh 5.0.1 | Cassandra 2.1.16 | CQL spec 3.2.1 | Native
protocol v3]
Use HELP for help.
cqlsh>

決定目前的密集策略如下：

  • 如果壓縮策略設為 SizeTieredCompactionStrategy，下列查詢的輸出內容為 org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy。
  • 如果壓縮策略設為 LeveledCompactionStrategy，下列查詢的輸出內容為 org.apache.cassandra.db.compaction.LeveledCompactionStrategy。

執行下列 CQL 以驗證壓縮策略：

  • 用來驗證鍵空間 kms 壓縮策略的 CQL：
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'organizations';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'maps';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'apps';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'app_credentials';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'api_products';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'apiproducts_appslist';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'api_resources';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'app_end_user';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'oauth_20_authorization_codes';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'oauth_20_access_tokens';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'oauth_10_request_tokens';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'oauth_10_access_tokens';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'oauth_10_verifiers';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name ='kms' and columnfamily_name = 'app_enduser_tokens';
  • 用 CQL 驗證鍵空間 user_settings 的壓縮策略： 
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'user_settings' and columnfamily_name = 'user_settings';
  • 用 CQL 驗證鍵空間 keyvaluemap 的壓縮策略： 
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'keyvaluemap' and columnfamily_name = 'keyvaluemaps_r21';
  • 用 CQL 驗證鍵空間 devconnect 的壓縮策略： 
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'devconnect' and columnfamily_name = 'developers';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'devconnect' and columnfamily_name = 'companies';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'devconnect' and columnfamily_name = 'company_developers';
  • 用 CQL 驗證鍵空間 counter 的壓縮策略： 
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'counter' and columnfamily_name = 'counters_current_version';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'counter' and columnfamily_name = 'counters_with_expiry';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'counter' and columnfamily_name = 'counters';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'counter' and columnfamily_name = 'key_timestamp_count';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'counter' and columnfamily_name = 'timestamp_key';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'counter' and columnfamily_name = 'period_timestamp';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'counter' and columnfamily_name = 'gateway_quota';
  • 用 CQL 驗證鍵空間 cache 的壓縮策略： 
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'cache' and columnfamily_name = 'cache_entries';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'cache' and columnfamily_name = 'cache_sequence_id_r24';
  • 用 CQL 驗證鍵空間 ax_custom_report_model 的壓縮策略： 
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'ax_custom_report_model' and columnfamily_name = 'report_description';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'ax_custom_report_model' and columnfamily_name = 'report_id_lookup';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'ax_custom_report_model' and columnfamily_name = 'org_metadata';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'ax_custom_report_model' and columnfamily_name = 'org_report_lookup';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'ax_custom_report_model' and columnfamily_name = 'report_created_view';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'ax_custom_report_model' and columnfamily_name = 'report_viewed_view';
  • 用 CQL 驗證鍵空間 auth 的壓縮策略： 
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'auth' and columnfamily_name = 'totp';
  • 用 CQL 驗證鍵空間 audit 的壓縮策略： 
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'audit' and columnfamily_name = 'audits';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'audit' and columnfamily_name = 'audits_ref';
  • 用 CQL 驗證鍵空間 apprepo 的壓縮策略： 
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apprepo' and columnfamily_name = 'organizations';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apprepo' and columnfamily_name = 'environments';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apprepo' and columnfamily_name = 'apiproxies';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apprepo' and columnfamily_name = 'apiproxy_revisions';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apprepo' and columnfamily_name = 'api_proxy_revisions_r21';
  • 用 CQL 驗證鍵空間 apimodel 的壓縮策略： 
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apimodel' and columnfamily_name = 'apis';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apimodel' and columnfamily_name = 'apis_revision';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apimodel' and columnfamily_name = 'resource';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apimodel' and columnfamily_name = 'method';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apimodel' and columnfamily_name = 'revision_counters';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apimodel' and columnfamily_name = 'template_counters';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apimodel' and columnfamily_name = 'template';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apimodel' and columnfamily_name = 'credentials';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apimodel' and columnfamily_name = 'credentialsv2';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apimodel' and columnfamily_name = 'schemas';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apimodel' and columnfamily_name = 'security';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'apimodel' and columnfamily_name = 'template_auth';
  • 用 CQL 驗證鍵空間 identityzone 的壓縮策略： 
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'identityzone' and columnfamily_name = 'identityzones';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'identityzone' and columnfamily_name = 'orgtoidentityzone';
  • 用 CQL 驗證鍵空間 dek 的壓縮策略： 
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'dek' and columnfamily_name = 'keys';
  • 用 CQL 驗證鍵空間 analytics 的壓縮策略： 
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'analytics' and columnfamily_name = 'custom_aggregates_defn';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'analytics' and columnfamily_name = 'custom_rules_defn';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'analytics' and columnfamily_name = 'custom_aggregates_defn_updates';
SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'analytics' and columnfamily_name = 'custom_rules_defn_updates';