變更 Cassandra 壓縮策略

Apigee 會使用 Cassandra 資料庫儲存大部分資料，包括 Proxy、快取和符記的資料。壓縮是一種標準程序，可減少資料庫中儲存的資料大小，這對於確保資料庫順暢運作至關重要。Cassandra 支援各種壓縮策略。Apigee 建議所有 Edge for Private Cloud 客戶，針對所有欄位系列，使用策略 LeveledCompactionStrategy 而非預設策略 SizeTieredCompactionStrategy 來運作 Cassandra 叢集。LeveledCompactionStrategy 的效能、磁碟使用率和壓縮效率都優於 SizedTieredCompactionStrategy，且所需的可用空間也較少。

所有新安裝的 Apigee 4.51.00 以上版本都會自動使用 LeveledCompactionStrategy 設定 Cassandra。不過，如果您使用的是舊版 Apigee，或是已從舊版升級至 Apigee 4.51.00，您的版本可能仍會使用 Cassandra 搭配 SizeTieredCompactionStrategy。如要瞭解您使用的 Cassandra 版本採用哪種壓縮策略，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

檢查現有的壓縮策略

如要檢查資料欄系列的現有壓縮策略，請按照「檢查壓縮策略」一文中的操作說明進行。如果壓縮策略已是 LeveledCompactionStrategy，您就不需要按照本頁的其他說明操作。

備份

由於變更壓縮策略會觸發 C* 節點中的完整壓縮週期，因此可能會因壓縮負載和同時應用程式流量而導致一些延遲。您可能需要回復這項變更，才能從備份還原 Cassandra 節點。請參閱「備份方式」，瞭解如何在變更壓縮策略前備份資料。

壓實總處理量

將壓縮策略變更為 LeveledCompactionStrategy 後，壓縮作業可能會執行很長一段時間。執行時間可能會因資料壓縮大小而異。在壓縮週期期間，Cassandra 可能會耗用更多系統資源。為確保壓縮作業不會占用太多系統資源，進而中斷 API 執行階段要求，建議您設定壓縮處理量的限制。

在每個節點上執行下列 nodetool 指令，將壓縮處理量設為所有 C* 節點的 128 MB 上限：

nodetool setcompactionthroughput 128

調整用於壓縮的 VM 大小

執行這項變更前，請確認 C* 節點有足夠的 CPU/記憶體資源。執行這項變更前，請確認沒有任何 C* 節點的 CPU 負載超過 25%。

壓縮策略變更後，系統會執行完整的壓縮週期，因此建議在流量較低的期間變更壓縮策略。

分批執行

您可能無法在一天內完成所有節點的變更作業，尤其是如果您操作的是大型 Cassandra 叢集，因為索引需要逐一在每個節點上重建。您可以一次變更一個結構定義或一個資料欄系列 (資料表) 的壓縮策略。為此，請變更資料欄系列，以便變更其壓縮策略，然後在所有節點上重建表格上的所有索引 (如有)。然後針對每個資料表或鍵值空間重複上述程序。針對一個資料表或一個鍵值空間執行這類作業時，可以將作業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，您可以執行下列操作：

  1. 變更資料表以變更壓縮策略：
       
ALTER TABLE kms.oauth_20_access_tokens WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  2. 重建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

變更壓縮策略

大致來說，改變壓縮策略的程序分為 2 個步驟：

  1. 修改每個資料表的壓縮策略。
  2. 逐一重建每個節點上的所有索引。

變更資料表以設定新的壓縮策略

在任一 Cassandra 節點上執行下列 Cassandra 查詢語言 (CQL) 指令，一次變更一個鍵值空間的策略。您可以在 cql 提示中執行 CQL。如要叫用 cql 提示，請按照下列步驟操作：

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

您會看到類似以下的回應：

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 來變更壓縮策略：

  • 用於變更鍵值空間 kms 的壓縮策略的 CQL：
    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'};
  • 變更鍵值空間 user_settings 的壓縮策略的 CQL：
    ALTER TABLE user_settings.user_settings WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 用於變更鍵值空間 keyvaluemap 的壓縮策略的 CQL：
       
ALTER TABLE keyvaluemap.keyvaluemaps_r21 WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 變更鍵值空間 devconnect 的壓縮策略的 CQL：
        
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'};
  • 變更鍵值空間 counter 的壓縮策略的 CQL：
    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'};
  • 變更鍵值空間 cache 的壓縮策略的 CQL：
    ALTER TABLE cache.cache_entries WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE cache.cache_sequence_id_r24 WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 變更鍵值空間 ax_custom_report_model 的壓縮策略的 CQL：
    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'};
  • 變更鍵值空間 auth 的壓縮策略的 CQL：
    ALTER TABLE auth.totp WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 變更鍵值空間 audit 的壓縮策略的 CQL：
    ALTER TABLE audit.audits WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE audit.audits_ref WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 變更鍵值空間 apprepo 的壓縮策略的 CQL：
    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'};
  • 用於變更鍵值空間 apimodel 的壓縮策略的 CQL：
    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'};
  • 用於變更鍵值空間 identityzone 的壓縮策略的 CQL：
    ALTER TABLE identityzone.IdentityZones WITH compaction = {'class' : 'LeveledCompactionStrategy'};
ALTER TABLE identityzone.OrgToIdentityZone WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 變更鍵值空間 dek 的壓縮策略的 CQL：
    ALTER TABLE dek.keys WITH compaction = {'class' : 'LeveledCompactionStrategy'};
  • 用於變更鍵值空間 analytics 的壓縮策略的 CQL：
    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'};

重新建立索引

您必須在壓縮策略變更後執行此步驟。依序在每個 Cassandra 節點上逐一執行下列 nodetool 指令。

執行下列 nodetool 指令，重新建構索引：

  • 重新建構鍵空間 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
  • 重新建構鍵空間 cache 的索引：
        
nodetool rebuild_index cache cache_entries cache_entries_cache_name_idx
  • 重新建構鍵空間 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
  • 重新建構鍵空間 apprepo 的索引：
    nodetool rebuild_index apprepo environments environments_organization_name_idx
  • 重新建構鍵空間 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」中的指示，確認結構定義的壓縮策略變更已生效。
  2. 確認壓縮功能是否已順利執行，且資料是否在策略變更後完成壓縮：
    1. 在每個 Cassandra 節點上執行下列 nodetool 指令，查看所有壓縮作業是否已完成，且沒有任何待處理的作業：
      nodetool compactionstats
    2. 使用上述指令確認沒有待處理的壓縮作業後，請檢查資料檔案 (位於 /opt/apigee/data/apigee-cassandra/data/ 下) 的上次修改時間戳記，確認時間戳記在執行壓縮策略變更 CQL 後。

復原

如果需要回溯，請按照下列任一做法操作：

方法 1：還原變更

將壓縮策略回溯至 SizeTieredCompactionStrategy。

請在任何 Cassandra 節點上執行下列 CQL，一次變更一個鍵值空間的策略。您可以在 cql 提示中執行 CQL。如要叫用 cql 提示，請按照下列步驟操作：

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

您會看到類似以下的回應：

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 來變更壓縮策略：

  • 用於變更鍵值空間 kms 的壓縮策略的 CQL：
    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'};
  • 變更鍵值空間 user_settings 的壓縮策略的 CQL：
    ALTER TABLE user_settings.user_settings WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 變更鍵值空間 keyvaluemap 的壓縮策略的 CQL：
    ALTER TABLE keyvaluemap.keyvaluemaps_r21 WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 變更鍵值空間 devconnect 的壓縮策略的 CQL：
    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'};
  • 用於變更鍵值空間 counter 的壓縮策略的 CQL：
    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'};
  • 用於變更鍵值空間 cache 的壓縮策略的 CQL：
    ALTER TABLE cache.cache_entries WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE cache.cache_sequence_id_r24 WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 變更鍵值空間 ax_custom_report_model 的壓縮策略的 CQL：
    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'};
  • 變更鍵值空間 auth 的壓縮策略的 CQL：
    ALTER TABLE auth.totp WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 變更鍵值空間 audit 的壓縮策略的 CQL：
    ALTER TABLE audit.audits WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE audit.audits_ref WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 變更鍵值空間 apprepo 的壓縮策略的 CQL：
    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'};
  • 用於變更鍵值空間 apimodel 的壓縮策略的 CQL：
    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'};
  • 用於變更鍵值空間 identityzone 的壓縮策略的 CQL：
    ALTER TABLE identityzone.IdentityZones WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
ALTER TABLE identityzone.OrgToIdentityZone WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 變更鍵值空間 dek 的壓縮策略的 CQL：
        
ALTER TABLE dek.keys WITH compaction = {'class' : 'SizeTieredCompactionStrategy'};
  • 變更鍵值空間 analytics 的壓縮策略的 CQL：
    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'};

所有資料欄群都已變更後，如果您已在將壓縮策略變更為 LeveledCompactionStrategy 的同時重建索引，就必須再次重建索引。請按照重建所有索引的步驟操作。如果您先前未重新建構索引，則在回復時不必重新建構索引。

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。

檢查壓縮策略

壓縮策略是在 Cassandra 的資料欄系列 (資料表) 層級設定。您可以使用下列 CQL 查詢，檢查每個資料欄族群的壓縮策略。

您可以在 cql 提示中執行 CQL。如要叫用 cql 提示，請按照下列步驟操作：

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

您會看到類似以下的回應：

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>

您可以透過下列方式判斷目前的壓縮策略：

  • 如果壓縮策略設為 SizeTieredCompactionStrategy，下列查詢的輸出結果會是 org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy。
  • 如果壓縮策略設為 LeveledCompactionStrategy，下列查詢的輸出結果會是 org.apache.cassandra.db.compaction.LeveledCompactionStrategy。

執行下列 CQL 來驗證壓縮策略：

  • 用於驗證鍵空間 kms 的壓縮策略的 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';
  • 用於驗證鍵空間 user_settings 的壓縮策略的 CQL：
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'user_settings' and columnfamily_name = 'user_settings';
  • 用於驗證鍵空間 keyvaluemap 的壓縮策略的 CQL：
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'keyvaluemap' and columnfamily_name = 'keyvaluemaps_r21';
  • 用於驗證鍵空間 devconnect 的壓縮策略的 CQL：
    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';
  • 用於驗證鍵空間 counter 的壓縮策略的 CQL：
    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';
  • 用於驗證鍵值空間 cache 的壓縮策略的 CQL：
    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';
  • 用於驗證鍵空間 ax_custom_report_model 的壓縮策略的 CQL：
    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';
  • 用於驗證鍵空間 auth 的壓縮策略的 CQL：
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'auth' and columnfamily_name = 'totp';
  • 用於驗證鍵空間 audit 的壓縮策略的 CQL：
    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';
  • 用於驗證鍵空間 apprepo 的壓縮策略的 CQL：
    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';
  • 用於驗證鍵空間 apimodel 的壓縮策略的 CQL：
    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';
  • 用於驗證鍵空間 identityzone 的壓縮策略的 CQL：
    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';
  • 用於驗證鍵空間 dek 的壓縮策略的 CQL：
    SELECT compaction_strategy_class from system.schema_columnfamilies where keyspace_name = 'dek' and columnfamily_name = 'keys';
  • 用於驗證鍵空間 analytics 的壓縮策略的 CQL：
    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';