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[Gluster-devel] RE: LOOKUP conflict => OPEN fails_


From: Fredrik Widlund
Subject: [Gluster-devel] RE: LOOKUP conflict => OPEN fails_
Date: Mon, 8 Feb 2010 16:56:51 +0100


It’s getting worse and worse. Upgraded to 3.0.2 but to no avail.

 

The prog_index.m3u8 files are being rewritten every 10 seconds. Every other read of a newly written index-file results in -1 and the file not being available, possibly until the next update of the file.

 

The strange thing is that until a few days ago this problem wasn’t noticeable at all, and now is huge. The only difference is the quickly growing number of files on the filesystem, now around 190k files.

 

Kind regards,

Fredrik Widlund

 

    Fredrik Widlund, CSO / Chief Architect
Direct: +46 8 459 90 32

Södra Hamnvägen 22 | 115 41 STOCKHOLM
Web and mobile: www.qbrick.com

Läskigt att prata framför kameran? Stefan Sauk har lösningen.

From: gluster-devel-bounces+address@hidden [mailto:gluster-devel-bounces+address@hidden On Behalf Of Fredrik Widlund
Sent: den 8 februari 2010 15:02
To: address@hidden
Subject: [Gluster-devel] LOOKUP conflict => OPEN fails_

 

 

Hi,

 

I’m running a simple AFR setup, thouch currently with only one backend, and 2 tcp clients. Version is 3.0.0 from jan 20.

 

Basically one client is writing a large number of files, continuously, and the other client is reading.

 

I have a growing problem with lookup “conflicts”, resulting in files being listed in directories but where reads are returning “-1 (No such file…”.

 

Restarting the client does not solve the conflict, but restarting the server does and the files becomes available again.

 

The filesystem is a 5TB XFS hw raid-5 with around 150k files.

 

Debug trace of client:

[2010-02-08 13:39:29] N [trace.c:148:trace_open_cbk] replicated: 3073: (op_ret=0, op_errno=117, *fd=0x129a430)

[2010-02-08 13:39:37] N [trace.c:1837:trace_open] replicated: 3094: (loc {path=/download/90910/live/webb1/webb1/Layer3/prog_index.m3u8, ino=5042185}, flags=32768, fd=0x1296fc0, wbflags=0)

[2010-02-08 13:39:37] N [trace.c:148:trace_open_cbk] replicated: 3094: (op_ret=-1, op_errno=2, *fd=0x1296fc0)

[2010-02-08 13:39:37] W [fuse-bridge.c:858:fuse_fd_cbk] glusterfs-fuse: 3094: OPEN() /download/90910/live/webb1/webb1/Layer3/prog_index.m3u8 => -1 (No such file or directory)

[2010-02-08 13:39:38] N [trace.c:1837:trace_open] replicated: 3100: (loc {path=/download/90910/live/webb1/webb1/Layer4/prog_index.m3u8, ino=5013773}, flags=32768, fd=0x1296fc0, wbflags=0)

[2010-02-08 13:39:38] N [trace.c:148:trace_open_cbk] replicated: 3100: (op_ret=0, op_errno=117, *fd=0x1296fc0)

[2010-02-08 13:39:38] N [trace.c:1837:trace_open] replicated: 3106: (loc {path=/download/90910/live/webb1/webb1/Layer4/Period1/segment277.ts, ino=5050371}, flags=32768, fd=0x129a430, wbflags=0)

[…]

 

And server:

[2010-02-08 13:39:09] D [dict.c:303:dict_get] dict: @this=(nil) @key=0x7fedee4e43f3

[2010-02-08 13:39:09] D [dict.c:303:dict_get] dict: @this=(nil) @key=0x7fedee4e440b

[2010-02-08 13:39:17] D [server-protocol.c:2037:server_open_cbk] server: 1719: OPEN (null) (0) ==> -1 (No such file or directory)

[2010-02-08 13:39:18] D [server-protocol.c:2037:server_open_cbk] server: 1724: OPEN (null) (0) ==> -1 (No such file or directory)

[2010-02-08 13:39:28] D [server-resolve.c:238:resolve_path_deep] store0: RESOLVE OPEN() seeking deep resolution of /download/90910/live/webb1/webb1/Layer3/prog_index.m3u8

[2010-02-08 13:39:28] D [dict.c:303:dict_get] dict: @this=(nil) @key=0x7fedee4e43db

[2010-02-08 13:39:28] D [dict.c:303:dict_get] dict: @this=(nil) @key=0x7fedee4e43f3

[2010-02-08 13:39:28] D [dict.c:303:dict_get] dict: @this=(nil) @key=0x7fedee4e440b

[2010-02-08 13:39:28] D [dict.c:303:dict_get] dict: @this=(nil) @key=0x7fedee4e43db

[…]

 

Kind regards,

Fredrik Widlund

 

 


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