rsync - Mar 2011 - [Bug 8027] New: io throtling based on /proc/loadvg

https://bugzilla.samba.org/show_bug.cgi?id=8027

           Summary: io throtling based on /proc/loadvg
           Product: rsync
           Version: 3.1.0
          Platform: All
        OS/Version: IRIX
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: core
        AssignedTo: wayned at samba.org
        ReportedBy: spamik at yum.pl
         QAContact: rsync-qa at samba.org


Rsync could use system loadavg (/proc/loadavg) measure to throttle disk
operations on both sites. This especially includes file table operations as
those are more costly. Checking loadavg every file is not a good idea, but
checking it every x seconds (when next file accessed) could be ok. If max load
is exceeded operations should freeze for few seconds (possibly another
parameter)

--load-check-interval-min = 5 (seconds)
--max-load = 8
--load-freeze = 10(seconds)

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https://bugzilla.samba.org/show_bug.cgi?id=8027

--- Comment #1 from Bj?rn Jacke <bj at sernet.de> 2011-03-21 12:53:54 UTC
---
io wait seems to be more reasonable than system load. system load simply telly
how many processes are waiting for _something_, which may not be related to
disk io at all.

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