Networker

[Networker] RE : [Networker] Speed of networker backups to d isk.

2005-05-24 06:19:45
Subject: [Networker] RE : [Networker] Speed of networker backups to d isk.
From: "Faidherbe, Thierry" <thierry.faidherbe AT HP DOT COM>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Tue, 24 May 2005 12:19:02 +0200
Based on your setup : as you have not the control on which are  the 10 saves 
started at 
the same time, and if your storagenode/server has faster NIC lan than the 
clients,
bring down per client parallelism to 2. This will allow more clients to send 
data
at the same time, resulting in more data to be sent to the storagenode/backup 
server
and then to an increased backup speed.
 
In worst case, 60% of your backup data stream may come from the same client (6 
saves of
the 10 allowed). NIC of 100Mb in FD mode giving 7-10MB/Sec is best case, this 
may bring down
your backup speed from client side.
 
Another way should be to increase your file device target session :
as SSID are stored on disk as file, you are not suffering og the tape 
multiplexing effect.
Assosciated in striped disks, your backup speed should be increased.
 
What is avg rate you get is you backup data locally to your file device ?
(in this test, you skip network equipment)
How is built the storage you created your file device on ? Striped diks, 
Concatenated disks ?
RAID5 ? Are you using other partition of these disks with other servers 
(physical disk being chuncked and
chuncks being used by different hosts) or volumes (different partitions -e:\ 
f:\ ...on the same physical disk(s))?

HTH,
 
TH
________________________________

De: Legato NetWorker discussion de la part de Rathindra Nath Dhali IT
Date: mar. 24/05/2005 11:58
À: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Objet : Re: [Networker] Speed of networker backups to disk.



In my understanding there won't be any problem for 4 small backups.

The provided data results as: 10 clients send 6 save sets => 10*6=60
save sets are processed at the same time. 10 save sets are processed
concurrently. Others remain in the que. But how much CPU /memory is it
occupying during the backup time? It is a GBIC LAN or using SAN
environment?
CPU, PROCESSOR and also LAN traffics can impact on Backup throughput.
Also SATA

Thanks & best regards

Rathindra Nath Dhali
Deputy Manager
Operations, IT Division
GrameenPhone Ltd.
Mobile: +88 017 1 500 978

-----Original Message-----
From: andrew.bridgeman AT CORUSGROUP DOT COM
[mailto:andrew.bridgeman AT CORUSGROUP DOT COM]
Sent: Tuesday, May 24, 2005 2:22 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU; Rathindra Nath Dhali IT
Cc: Andrew Bridgeman
Subject: Re: Speed of networker backups to disk.

I have 10 Clients set-up, 6 backup large amounts of data and 4 backup
small
amounts of data ( 10 minutes worth ). I have the devices set to 10
target
sessions and the clients set to 6 parallelism. The disks are 1 TB
partitions sata disks ntfs basic setup. Do you think i should change any
of
these settings or are they alright?

Regards

Andrew Bridgeman

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