Re: [HACKERS][PATCH] Applying PMDK to WAL operations for persistent memory - Mailing list pgsql-hackers

From Takashi Menjo
Subject Re: [HACKERS][PATCH] Applying PMDK to WAL operations for persistent memory
Date
Msg-id 000501d4b794$5094d140$f1be73c0$@lab.ntt.co.jp
Whole thread Raw
In response to [HACKERS][PATCH] Applying PMDK to WAL operations for persistent memory  (Yoshimi Ichiyanagi <ichiyanagi.yoshimi@lab.ntt.co.jp>)
List pgsql-hackers
Hi,

Peter Eisentraut wrote:
> When you manage the WAL (or perhaps in the future relation files)
> through PMDK, is there still a file system view of it somewhere, for
> browsing, debugging, and for monitoring tools?

First, I assume that our patchset is used with a filesystem that supports
direct access (DAX) feature, and I test it with ext4 on Linux.  You can cd
into pg_wal directory created by initdb -X pg_wal on such a filesystem, and
ls WAL segment files managed by PMDK at runtime.

For each PostgreSQL-specific tool, perhaps yes, but I have not tested yet.
At least, pg_waldump looks working as before.

Regards,
Takashi

-- 
Takashi Menjo - NTT Software Innovation Center
<menjo.takashi@lab.ntt.co.jp>





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