Re: Load distributed checkpoint

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От Takayuki Tsunakawa
Тема Re: Load distributed checkpoint
Дата
Msg-id 040c01c72430$72a69b60$19527c0a@OPERAO
обсуждение исходный текст
Ответ на Load distributed checkpoint  (ITAGAKI Takahiro <itagaki.takahiro@oss.ntt.co.jp>)
Ответы Re: Load distributed checkpoint  (Martijn van Oosterhout <kleptog@svana.org>)
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Дерево обсуждения 
> That implies that fsyncing a datafile blocks fsyncing the WAL. That
> seems terribly unlikely (although...). What OS/Kernel/Filesystem is
> this. I note a sync bug in linux for ext3 that may have relevence.

Oh, really?  What bug?  I've heard that ext3 reports wrong data to
iostat when it performs writes (the data is correct when performing
reads.)
My env is:

OS: RHEL 4.0 for AMD64/EM64T
kernel: 2.6.9-42.ELsmp
The file system is ext3.

Terribly unlikely?  But I've seen the disk utilization quite often.

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