Re: [PATCH]make pg_rewind to not copy useless WAL files

From: chenhj <chjischj(at)163(dot)com>
To: "Alexander Korotkov" <a(dot)korotkov(at)postgrespro(dot)ru>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [PATCH]make pg_rewind to not copy useless WAL files
Date: 2017-09-28 19:52:43
Message-ID: d4495b3.674.15eca0c6329.Coremail.chjischj@163.com
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On 2017-09-29 00:43:18,"Alexander Korotkov" <a(dot)korotkov(at)postgrespro(dot)ru> wrote:

On Thu, Sep 28, 2017 at 6:44 PM, chenhj <chjischj(at)163(dot)com> wrote:

On 2017-09-28 01:29:29,"Alexander Korotkov" <a(dot)korotkov(at)postgrespro(dot)ru> wrote:

It appears that your patch conflicts with fc49e24f. Please, rebase it.

Yes, i had rebased it, Please check the new patch.

Good, now it applies cleanly.

else if (strncmp(path, XLOGDIR"/", strlen(XLOGDIR"/")) == 0 &&
IsXLogFileName(path + strlen(XLOGDIR"/")) &&
(strcmp(path + strlen(XLOGDIR"/") + 8, divergence_wal_filename + 8) < 0 ||
strcmp(path + strlen(XLOGDIR"/") + 8, last_source_wal_filename + 8) > 0))

According to our conding style, you should leave a space betwen XLOGDIF and "/".
Also, you do a trick by comparison xlog segment numbers using strcmp(). It's nice, but I would prefer seeing XLogFromFileName() here. It would improve code readability and be less error prone during further modifications.

------
Alexander Korotkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company

Thanks for advice!
I had modified it.

-----
Best Regards,
Chen Huajun

Attachment Content-Type Size
pg_rewind_wal_copy_reduce_v5.patch application/octet-stream 9.4 KB

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