On Sun, Mar 29, 2015 at 12:43 PM, Goffredo Baroncelli <[email protected]> wrote: > Hi, > did you find the time to give a look a these patches ? Do you have any > suggestions ? >
I do not know about anyone else, but this message was in my spam box. The reason was: "It has a from address in libero.it but has failed libero.it's required tests for authentication". Best regards, -- Cameron Norman > On 2015-03-21 12:56, Goffredo Baroncelli wrote: >> >> Hi all, >> >> these patches set reverts the commit 11689d2 "journald: turn off COW for >> journal files on btrfs" which enables *unconditionally* the NOCOW flag for >> the >> journal files. The reason was that the performances of the journal file >> format >> are very bad on btrfs, and decrease during the time. Disabling the COW >> behavior, the perfomances increase. >> Unfortunately disabling the COW behavior leads to disable the BTRFS >> checksums, >> which in turn prevents BTRFS to rebuild a corrupted file in a RAID >> filesystem [3]. >> >> To avoid that I proposed a patch which introduces a configurable option to >> disables the "turn off COW" behavior[1]. Lennart commented that instead he >> prefer to set the NOCOW attribute via tmpfile.d snippets. >> >> A further patches set was proposed and accepted [2] to extend >> systemd-tmpfiles >> to change the file attributes. >> >> This last patches set removes the "turn off COW" behavior (patch #1) and >> introduces a new tmpfiles.d snippet which enable the NOCOW beahvior for the >> journal files (patch #2). So a sysadmin can disable this setting overriding >> this file configuration. >> >> BR >> G.Baroncelli >> >> >> [1] Re: [systemd-devel] [RFC][PATCH] Add option to enable COW for journal >> file >> https://www.mail-archive.com/[email protected]/msg28724.html >> >> [2] >> https://www.mail-archive.com/[email protected]/msg29313.html >> >> [3] http://en.wikipedia.org/wiki/Btrfs#Checksum_tree_and_scrubbing >> >> -- >> gpg @keyserver.linux.it: Goffredo Baroncelli <kreijackATinwind.it> >> Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5 >> _______________________________________________ >> systemd-devel mailing list >> [email protected] >> http://lists.freedesktop.org/mailman/listinfo/systemd-devel >> _______________________________________________ systemd-devel mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/systemd-devel
