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low backup speed on windows server 2016 with windows deduplication enabled

Andy70
Level 2

Hi there,

we have an issue on windows server 2016. The sever has 3 raid 6 volumes, system, data and backup. After enabling deduplication on the data partition backup speed dropped from 4.2 GB/min to 2.6 GB/min (LTO6). Testing with simple filecopy between data and backup partition don't show such a significant decrease.

The server is under lab conditions, no users connected. The is no third party virus protection or software just windows server 2016, backupexec 16 an 1 TB data for testing.

Any suggestions?

thanks
Andy

2 REPLIES 2

CraigV
Moderator
Moderator
Partner    VIP    Accredited

Hi,

Remember when backing up deduped data it rehydrates. This extends the backup time. It's no different to duplicating backups from an array such as a Data Domain or StoreOnce to tape. Your speed will drop as data is rehydrated during the move to tape.

Thanks!

Hello Craig,

thanks for your reply. We expected a lower backup speed because rehydrating but 50% seems to be to much. And why don't we see this drop during simple filecopy from a dedubed volume to no dedubed volume, there rehydrating will also occur.

thanks
Andy