Just one dle. No compression - data is already compressed (gzip). No encryption. I am using holding disk.
Attached files: - amdump.1 direct from client amdump.3 through NFS. ---------------------------------------- > Date: Thu, 22 Oct 2009 11:58:57 -0400 > From: martin...@zmanda.com > To: ap_griffi...@hotmail.com > CC: dus...@zmanda.com; amanda-users@amanda.org > Subject: Re: TCP Tuning > > You talk about one dle or multiple dle? > Are you using compression or encryption? on client or server? > Are you using holding disk? or dumping directly to tape? > Post the amdump. file for when it use NFS and when it doesn't use it. > > Jean-Louis > > Alan Griffiths wrote: >> amgtar with blocksize set to 512 performs at the same speed. >> >> If I mount the partition on the backup server via NFS then the backup runs >> about 6x quicker. So I'm assuming it must be something related to way AMANDA >> sets up up the TCP connection. Although obviously open to other suggestions. >> >> Alan >> >> >> ---------------------------------------- >> >>> Date: Wed, 21 Oct 2009 06:59:01 -0400 >>> From: martin...@zmanda.com >>> To: ap_griffi...@hotmail.com >>> CC: dus...@zmanda.com; amanda-users@amanda.org >>> Subject: Re: TCP Tuning >>> >>> Use the amgtar application and set the TAR-BLOCKSIZE to a bigger value >>> (half the STREAM_BUFSIZE. >>> >>> Why do you believe it is bottleneck? >>> >>> Jean-Louis >>> >>> Alan Griffiths wrote: >>> >>>> Thanks for the pointer. >>>> >>>> I've re-compiled with >>>> >>>> define STREAM_BUFSIZE (NETWORK_BLOCK_BYTES * 16) >>>> >>>> And I can see that has taken effect on the server >>>> >>>> dumper: try_socksize: send buffer size is 524288 >>>> >>>> But backups are running no faster and I cannot see any indication on >>>> the client of the buffer size being used. Note: client also has the >>>> new binaries. In older versions of AMANDA amandad used to report >>>> buffer size, but this appears to not be the case in 2.6.1p1. >>>> >>>> Thanks, >>>> >>>> Alan >>>> >>>> >>>>> Date: Mon, 19 Oct 2009 10:03:21 -0400 >>>>> Subject: Re: TCP Tuning >>>>> From: dus...@zmanda.com >>>>> To: ap_griffi...@hotmail.com >>>>> CC: amanda-users@amanda.org >>>>> >>>>> On Mon, Oct 19, 2009 at 5:33 AM, Alan Griffiths >>>>> wrote: >>>>> >>>>>> Is there a way to modify the size of the TCP buffers used by >>>>>> >>>> AMANDA? I am >>>> >>>>>> trying to improve performance over a relatively high latency link >>>>>> >>>> and this >>>> >>>>>> seems to be the only way. >>>>>> >>>>> It's a source constant, unfortunately, set in stream.h (STREAM_BUFSIZE). >>>>> >>>>> A patch to make that configurable at compile time or, better, at >>>>> runtime would be much appreciated! >>>>> >>>>> Dustin >>>>> >>>>> -- >>>>> Open Source Storage Engineer >>>>> http://www.zmanda.com >>>>> >>>> ------------------------------------------------------------------------ >>>> Download Messenger onto your mobile for free. Learn more. >>>> >>>> >> >> _________________________________________________________________ >> New Windows 7: Find the right PC for you. Learn more. >> http://www.microsoft.com/windows/buy/ > _________________________________________________________________ Chat to your friends for free on selected mobiles http://clk.atdmt.com/UKM/go/174426567/direct/01/