| To: | Christoph Hellwig <hch@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: XFS and nobarrier with SSDs |
| From: | Georg Schönberger <g.schoenberger@xxxxxxxxxx> |
| Date: | Mon, 14 Dec 2015 10:34:30 +0000 |
| Accept-language: | en-US, de-DE |
| Cc: | Martin Steigerwald <martin@xxxxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Linux FS-Devel <linux-fsdevel@xxxxxxxxxxxxxxx>, Jeff Moyer <jmoyer@xxxxxxxxxx>, Linux Block mailing list <linux-block@xxxxxxxxxxxxxxx>, XFS mailing list <xfs@xxxxxxxxxxx> |
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| Thread-topic: | XFS and nobarrier with SSDs |
On 2015-12-14 11:27, Christoph Hellwig wrote: > On Mon, Dec 14, 2015 at 10:18:54AM +0000, Georg Sch?nberger wrote: >>> Or to phrase it >>> differently: If nobarrier makes a difference skipping it is not safe. >> I do not fully understand that sentence, what do you mean by "makes a >> difference" and "skipping is not safe"? > The rule of thumb is: if nobarrier makes your workload run faster you > should not be using it, aka: don't use it. OK, thanks for clarification. Should the XFS FAQ be updated? *http://xfs.org/index.php/XFS_FAQ#Q._Should_barriers_be_enabled_with_storage_which_has_a_persistent_write_cache.3F |
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