Re: iSCSI holding disk: slow read.

2010-09-29 Thread Valeriu Mutu
Hi Dustin, Quote: Perhaps Amanda's not *writing* data very quickly at that point - maybe your tape drive is shoe-shining? What do you mean by shoe-shining? Best, Valeriu On Wed, Sep 15, 2010 at 10:17:04PM -0500, Dustin J. Mitchell wrote: On Wed, Sep 15, 2010 at 8:08 PM, Valeriu Mutu

Re: iSCSI holding disk: slow read.

2010-09-29 Thread Dustin J. Mitchell
On Wed, Sep 29, 2010 at 11:46 AM, Valeriu Mutu vm...@pcbi.upenn.edu wrote: What do you mean by shoe-shining? shoe-shining is when a tape drive must stop the tape repeatedly while it buffers more deta. It creates a lot of wear on the tape, and also kills performance. Dustin -- Open Source

iSCSI holding disk: slow read.

2010-09-15 Thread Valeriu Mutu
Hi, I am using Amanda 2.6.1p2. I'm currently using Equallogic iSCSI storage for Amanda's holding disk. My current Amanda server has iptables disabled because this somehow affects iSCSI multipathing, i.e. if iptables is enabled, only one path works. I have yet to determine how to get

Re: iSCSI holding disk: slow read.

2010-09-15 Thread Dustin J. Mitchell
On Wed, Sep 15, 2010 at 8:08 PM, Valeriu Mutu vm...@pcbi.upenn.edu wrote: /dev/mapper/cronos-amanda-holdingdisk                886G  116G  726G  14% /data3 /dev/mapper/cronos-amanda-diskbuffer                394G  199M  374G   1% /data4 350G seems a bit large for a disk buffer - what part