Re: holding disk when using HD backup ?
2006-03-07 15:43:54
Sorry if I was no clear enough :-)
My setup :
1 amanda server with virtual tape (hard disk)
20 remote clients
My problems : my server is overloaded during the backup. I suppose that
I can play with those parameters to reduce the load :
compress parameter should be client and not on amanda server
reduce inparallel (now 10)
reduce maxdumps (now 4)
thanks!
Ram "TK" Krishnamurthy wrote:
> Jon
> My comment was for backing upto disks. And I mis-read the original
> post that he was backing to tape. You are correct that holding disk is
> key for dumping multiple dle's.
>
>
> tk
>
> Jon LaBadie wrote:
>> On Tue, Mar 07, 2006 at 12:07:25PM -0800, Ram TK Krishnamurthy wrote:
>>
>>> You generally do not use holding disks when backing up to disks.
>>>
>>> tk
>>>
>>> FM wrote:
>>>
>>>> Hello,
>>>>
>>>> Do I need a holdingdisk when I using hard drive backup ?
>>>>
>>>> I have a lots of iowait because of the copy from holding disk to
>>>> virtual
>>>> tape even if the holding disk is on internal SCSI drives and tapes are
>>>> on an extrenal SCSI array (using sata drives)
>>
>>
>>
>> Why not Ram? Without a holding disk only one client DLE can
>> be dumped at a time. The holding disk is to allow multiple
>> DLEs to collect simultaneously, only transfered to "tape"
>> when complete. Without a holding disk the DLE must be
>> dumped "directly to tape" eliminating all parallelism.
>>
>
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