Avamar:Data Domain 整合:複寫報告「串流不足」錯誤
Summary: 在與 Data Domain 整合的 Avamar 環境中,複寫正在完成,但因「串流不足」錯誤而出現例外情況。
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Symptoms
在與 Data Domain (DD) 整合的 Avamar 環境中,複寫正在部分完成,但記錄中出現下列例外狀況:
2019-07-01 17:02:14 avtar Info <41435>: - Data Domain configured in Stand-Alone mode.
2019-07-01 17:02:14 avtar Info <40206>: Setting default storage unit to 'avamar-1315232775' for handle 2
2019-07-01 17:02:14 avtar Info <41440>: Data Domain handle:2 capabilities:0x0020021B
2019-07-01 17:02:14 avtar Info <10609>: Data Domain Destination login to ddxxxx.net complete
2019-07-01 17:02:15 avtar Info <42385>: id:1 Range-Replication selected because it is supported since DDOS 6.0 (container.1.cdsf)
2019-07-01 17:02:15 avtar Info <40160>: - Establishing a connection to the Data Domain system with basic authentication (Connection mode: A:0 E:0).
..
2019-07-01 17:02:18 avtar Info <40160>: - Establishing a connection to the Data Domain system with basic authentication (Connection mode: A:0 E:0).
2019-07-01 17:02:21 avtar Error <0000>: Replication failed - id: 3, unexpected exception caught: ddr_replthread:3:replicateSlice: ddp_filecopy_status failed
[179027] [140372932351744] Mon Jul 1 17:02:21 2019
ddp_filecopy_status() failed, start_offset[0], length[20971520], Err: 5539-filecopy operation failed (nfs: Out of Streams)
[179027] [140372932351744] Mon Jul 1 17:02:19 2019
ddp_filecopy_stop() failed, Err: 5004-nfs filecopy stop failed (nfs: No such file or directory)
...
[179027] [140372992386816] Mon Jul 1 17:02:15 2019
ddp_access() failed, Path avamar-1437556709/STAGING/09a1003e41e2a0d9e3333cf9fbb3345e0b665a0e/BACKUP-01974498BF0587FFD2EC4A97BD201139F29D9516-1D52F902DDF23FC, mode 0 Err: 5004-nfs lookup failed (nfs: No such file or directory)
[179027] [140372992386816] Mon Jul 1 17:02:14 2019
ddp_access() failed, Path avamar-1315232775/STAGING/09a1003e41e2a0d9e3333cf9fbb3345e0b665a0e/BACKUP-01974498BF0587FFD2EC4A97BD201139F29D9516-1D52F902DDF23FC, mode 0 Err: 5004-nfs lookup failed (nfs: No such file or directory)
..
2019-07-01 17:02:29 avtar Info <40176>: - Multi-stream restore summary (current 0, max active 0, max cloned 0, total cloned 0, ddr handle 2):
2019-07-01 17:02:29 avtar FATAL <0000>: Replication failed
2019-07-01 17:02:29 avtar FATAL <40009>: DDR encountered errors.
2019-07-01 17:02:29 avtar Info <9772>: Starting graceful (staged) termination, DDR_ERROR event received (fatal severity) (wrap-up stage)
2019-07-01 17:02:29 avtar Info <0000>: Entering the 'final' phase of termination, DDR_ERROR need to exit)
2019-07-01 17:02:29 avtar Info <40176>: - Multi-stream restore summary (current 0, max active 0, max cloned 0, total cloned 0, ddr handle 2):
2019/07/01-14:02:29.25907 [avtar] INTERNAL ERROR: <0001> assert error (result == MSG_ERR_NONE), /local/jenkins/workspace/server_rollup_hotfix_SLES11-64/src/avtar/ade/adelib/interfaceade.cpp line 396
2019-07-01 17:02:29 avtar Info <5675>: Replicated 0 of 78 backups (0 errors) for client "ddxxxx.net"
2019-07-01 17:02:29 avtar Error <6655>: Replicate interrupted.
2019-07-01 17:02:29 avtar Info <7925>: Restored 940.4 KB from selection(s) with 6.000 GB in 1 files
2019-07-01 17:02:29 avtar Info <6090>: Restored 940.4 KB in 0.34 minutes: 159.9 MB/hour (174 files/hour)
已確認 Avamar 和來源 Data Domain 以及來源和目標 Data Domain 之間的連線能力 (在連接埠 111、2049、2051、2052 上使用 ping、ssh 和 telnet (或 curl))。
Cause
單個複製組包含多個 (4+) 用戶端。
在複製群組中,「max-concurrent-processes」設定為四個代表會同時複製四個用戶端
這導致來源和目標 Data Domain 之間的串流數量多於可用的串流。
Resolution
1.在個別的 Data Domain 上執行下列命令,即可檢查 Data Domain 來源和目標上的最大串流計數:
ddboost@dd# ddboost streams show active
--------- Active Streams -------- --------- Soft Limits -------- - Hard Limit -
Name Read Write Repl-out Repl-in Read Write Repl Combined Combined
----------------- ---- ----- -------- ------- ---- ----- ---- -------- --------------
avamar-xxxxx 0 0 0 0 - - - - -
----------------- ---- ----- -------- ------- ---- ----- ---- -------- --------------
DD System Stream Limits: read=6 write=35 repl-in=20 repl-out=18 combined=30
2.將允許的最大計數與實際流活動進行比較,如 repl-in 或 repl-out 分別在目標和來源 DD 上。
知識文章 Data Domain:DDOS 6.0 支援的串流計數也有每個型號支援的串流計數清單。本文亦包含指向舊版 DDOS 4.0 至 5.7 的連結。
3.檢閱 Data Domain 複寫串流的並行程序上限和上限。
4.進行相應調整,以符合來源和目標 Data Domain 之間的可用串流計數:
-
如果要按字母順序複製用戶端:
- 四個用戶端將同時複製,創建 24 個流(預設為每個用戶端 6 個)
- 預設值可以通過使用自由格式標誌「
[avtar]ddr-repl-max-parallel-streams」,的值在 UI 中的值為 1-29。
-
如果用戶端是並行複製 (集區式複製),則有一個額外的設定「Data Domain 複製串流的最大數量」,以控制每個用戶端的串流數量。
作為資源利用率和管理的最佳做法,請確保將用戶端劃分為多個複製組。
Additional Information
檢閱複寫記錄時:
-
的值”
max-streams」等效於 UI 中的「最大併發進程」。 -
的值”
max-ddr-streams」等同於 UI 中的「Data Domain 複寫串流數量上限」。
Affected Products
Avamar, Avamar ServerArticle Properties
Article Number: 000044317
Article Type: Solution
Last Modified: 30 Sept 2025
Version: 5
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