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High latency during backup

Created: Dec 29, 2020 07:22:07Latest reply: Dec 20, 2021 20:23:57 218 2 2 0 0

【Problem Analysis】: From the performance data analysis :

We can see the latency is high after 18:00 every.

Then we found that CPU usage kept very high every day.

So the storage system was running at full load during the daytime. After 18:00, the backup service pressure increased, causing the storage system to enter the overload control read state. Therefore, the LUN I/O response latency was high after 18:00.

DBN-KK-ST-SVC05sent a large pressure to storage all day.

【Root Cause】: The storage system was running at full load during the daytime. After 18:00, the backup service pressure increased, causing the storage system to enter the overload control read state. Therefore, the LUN I/O response latency was high after 18:00.

【Solution Description】: Migrate some services to another storage, or expand the controller of this storage.

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user_4326135

Moderator Created Dec 15, 2021 09:04:58

Nice solution post on high latency during backup

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Vesper_EvenStar

Moderator Created Dec 20, 2021 20:23:57

Good article on how to deal with excessive backup latency.

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