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Nobarrier on Ext4
| Posted by NameSniper, 06-18-2015, 08:28 AM | | Hi,
Does anyone know whether if its safe from the point of data integrity to set barrier=0 on Ext4?
This certain server isnt running RAID, but hard reboots might happen.
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| Posted by Syslint, 06-18-2015, 10:12 AM | | Setting barrier=0 may increase the performance . But it seems you don't have any other protection mechanism like RAID , so better not to set it.
PS : Make proper updating backups and set it if you still wish :-D
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| Posted by NameSniper, 06-18-2015, 10:32 AM | | Hi,
My server is based on CentOS 6.x, if it matters.
Does anyone have first hand experience with setting barrier to 0 on such a setup?
I am still trying to understand the risks because as far as I have read, on CentOS 5.x barrier=0 was a default.
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| Posted by Srv24x7, 06-18-2015, 10:35 AM | | Hi,
Check what the below link has to say on this:
access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/writebarrieronoff.html
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The use of nobarrier is no longer recommended in Red Hat Enterprise Linux 6 as the negative performance impact of write barriers is negligible (approximately 3%). The benefits of write barriers typically outweigh the performance benefits of disabling them.
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| Posted by NameSniper, 06-22-2015, 01:08 PM | | Hi,
From that article
Which I guess covers all VPS servers.
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| Posted by servermates, 06-23-2015, 04:46 AM | | Please check this link.
https://access.redhat.com/documentat...rieronoff.html
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