NDMP 备份速度较慢

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适用场景

ONTAP 9
NDMP 3 向
DMA （数据管理应用程序）
性能

问题描述

使用备份服务器备份其中一个卷的速度较慢
经调查后，所有 NDMP 三向备份在第 3 和第 4 阶段速度较慢：

备份日志：

Mon Jul 26 18:00:53 SAST 202 /<vserver>/Abrasives/(4) Log_msg (Phase 3 throughput (MB sec): read 1 write 5 Mon Jul 26 18:00:53 SAST 202 /<vserver>/Abrasives/(4) Log_msg (Phase 4 throughput (MB sec): read 0 write 3 Mon Jul 26 18:01:49 SAST 202 /<vserver>/Tech_and_Spec/(2) Log_msg (Phase 3 throughput (MB sec): read 3 write 6 Mon Jul 26 18:01:49 SAST 202 /<vserver>/Tech_and_Spec/(2) Log_msg (Phase 4 throughput (MB sec): read 2 write 3 Mon Jul 26 18:02:31 SAST 202 /<vserver>/R_and_D/(3) Log_msg (Phase 3 throughput (MB sec): read 4 write 8 Mon Jul 26 18:02:31 SAST 202 /<vserver>/R_and_D/(3) Log_msg (Phase 4 throughput (MB sec): read 2 write 3 Mon Jul 26 19:22:51 SAST 202 /<vserver>/Home/(1) Log_msg (Phase 3 throughput (MB sec): read 1 write 6 Mon Jul 26 19:22:51 SAST 202 /<vserver>/Home/(1) Log_msg (Phase 4 throughput (MB sec): read 3 write 3 Tue Jul 27 18:00:53 SAST 202 /<vserver>/Abrasives/(3) Log_msg (Phase 3 throughput (MB sec): read 1 write 7 Tue Jul 27 18:00:53 SAST 202 /<vserver>/Abrasives/(3) Log_msg (Phase 4 throughput (MB sec): read 0 write 3 Tue Jul 27 18:02:40 SAST 202 /<vserver>/R_and_D/(4) Log_msg (Phase 3 throughput (MB sec): read 4 write 8 Tue Jul 27 18:02:40 SAST 202 /<vserver>/R_and_D/(4) Log_msg (Phase 4 throughput (MB sec): read 2 write 3 Tue Jul 27 18:07:27 SAST 202 /<vserver>/Tech_and_Spec/(2) Log_msg (Phase 3 throughput (MB sec): read 6 write 11 Tue Jul 27 18:07:27 SAST 202 /<vserver>/Tech_and_Spec/(2) Log_msg (Phase 4 throughput (MB sec): read 3 write 3 Tue Jul 27 19:38:01 SAST 202 /<vserver>/Home/(1) Log_msg (Phase 3 throughput (MB sec): read 1 write 6 Tue Jul 27 19:38:01 SAST 202 /<vserver>/Home/(1) Log_msg (Phase 4 throughput (MB sec): read 3 write 3

转储到空速度正常：

Tue Jul 27 16:42:09 SAST 202 /vol/Data/(1) Log_msg (Phase 3 throughput (MB sec): read 22 write 39 Tue Jul 27 16:42:09 SAST 202 /vol/Data/(1) Log_msg (Phase 4 throughput (MB sec): read 241 write 241