Yes parallelism & target sessions do effect performance.
The more is the server parallelism, the more data streams are written on
the backup device.
IF target session is set to less than the group parallelism & you are
using multiple devices, the same set of data gets divided over multiple
drives. This can be set to an optimum value such that if some data streams
are waiting as the drive cannot write more, then those streams are written
by the second drive. In Legato, this happens automatically depending on
the values set, no. of drives & no. of writeable media in the pool.
Regards,
Anuj Mediratta
Legato Certified Networker Administrator
Ace Data Devices Pvt. Ltd.
I-132, Ist Floor,
Kirti Nagar,
New Delhi - 110 015.
Phone : 011-51424914
Mobile - 011-32334262
-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTMAIL.TEMPLE DOT EDU]
On Behalf Of Laurence Moughan
Sent: Monday, September 27, 2004 14:24
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: [Networker] Parallelism and Target session effect performance ?
NW 7.2
Hi All,
I was wondering if settings of Parallelism on the server and target
session ons on the devices could effect performance.
I have both at 10 for a server and storage node - storage node is used
for cloning of the tapes at savegroup completeion - the cloning seems
quite slow.
Wonder best settings for max performance - backup and clone ( not
worried about the recovery times as SLA give me large window ) but i
need quicked possible backups.
TIA
Laurence
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