7 messages in ru.sysoev.nginxRe: nginx 0.7.59 open_file_cache and NFS| From | Sent On | Attachments |
|---|---|---|
| andan andan | Jun 10, 2009 2:48 am | |
| Igor Sysoev | Jun 10, 2009 3:03 am | |
| andan andan | Jun 10, 2009 3:23 am | |
| Igor Sysoev | Jun 10, 2009 3:50 am | |
| andan andan | Jun 10, 2009 4:06 am | |
| Igor Sysoev | Jun 10, 2009 4:09 am | |
| andan andan | Jun 10, 2009 4:32 am |
| Subject: | Re: nginx 0.7.59 open_file_cache and NFS | |
|---|---|---|
| From: | Igor Sysoev (is...@rambler-co.ru) | |
| Date: | Jun 10, 2009 4:09:43 am | |
| List: | ru.sysoev.nginx | |
On Wed, Jun 10, 2009 at 01:06:32PM +0200, andan andan wrote:
2009/6/10 Igor Sysoev <is...@rambler-co.ru>:
On Wed, Jun 10, 2009 at 12:24:02PM +0200, andan andan wrote:
2009/6/10 Igor Sysoev <is...@rambler-co.ru>:
On Wed, Jun 10, 2009 at 11:49:00AM +0200, andan andan wrote:
We have two nginx serving static objects from a shared NFS partition, and we are using open_file_cache for performance purposes:
With nginx 0.6.x, when the developers uploads files, during a few seconds (less than 30s) we see this errors in logs:
[alert] 2721#0: *75303 sendfile() failed (116: Stale NFS file handle) while sending response to client, client: XXX ....
I understand that is a normal behaviour because we are using a open_file_cache.
But, when we upgrade to nginx 0.7.59 the same errors appears indefinitely (and of course we are sending corrupted objects or blank), it seems that, open_file_cache_valid is been ignored in new version.
Any idea, tip or recomendation ?
In other hand, is recomended the use of open_file_cache, until now, we are very happy with it.
What OS do you using on NFS client and server side ?
Client: RHEL5 2.6.18-128.1.10.el5 x86_64
Server: NAS EMC Celerra NS40
How files are uploaded - simple cp or
cp file file.temp rm file mv file.temp file
Normally, they uploads files via scp, but editing a file by hand the errors appears on the same way.
This is because it's no atomic method. On local filesystem you may get mixed content from old and new versions without any errors.
mmm, then, is recommended to disable open_file_cache in this scenario ?
Even if you will disable open_file_cache, the race condition still remains. open_file_cache simply makes it distinct: 30s vs 20ms and so.
I'm curious about the question that with nginx 0.6.x in a few seconds the file is "ready" again, but no with 0.7.x
Can not say right now.
-- Igor Sysoev http://sysoev.ru/en/