Re: [ADSM-L] LTO4 Tape Volumes with diferent Estimated Capacity
2012-01-19 08:41:39
Tiago,
Generally speaking hardware compression (tape drive) will always yield
better results than software based compression.
I would only use the client compression when bandwidth issues come into
play, like remote offices with limited WAN bandwidth or a slow congested
LAN segment. In these cases compressing at the client would reduce the
data that has to traverse the network.
~Rick
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Botelho, Tiago (External)
Sent: Thursday, January 19, 2012 4:57 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] LTO4 Tape Volumes with diferent Estimated Capacity
Hello all
Thank you for your all answers.
Regarding to your experience what is more efficiency regarding to tape
usage capacity (increase tape amount of data stored)? Compression on
client or compression on Drive(HW)?
Cumprimentos / Best regards
Tiago Botelho
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Botelho, Tiago (External)
Sent: quarta-feira, 18 de Janeiro de 2012 15:27
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] LTO4 Tape Volumes with diferent Estimated Capacity
Hello
I have several tape volumes (LTO4) with different Estimated Capacity.
What can cause this situation?
Ex:
A00035L4 WIN_SRV_T TS3310 629.5 G
95.4 Full
A00039L4 WIN_SRV_T TS3310 1.1 T
98.2 Full
A00101L4 WIN_SRV_T TS3310 884.8 G
84.4 Full
A00113L4 WIN_SRV_T TS3310 1.0 T
93.7 Full
A00118L4 WIN_SRV_T TS3310 1.0 T
73.6 Full
A00128L4 WIN_SRV_T TS3310 1.0 T
99.2 Full
A00129L4 WIN_SRV_T TS3310 969.1 G
93.7 Full
A00133L4 WIN_SRV_T TS3310 934.8 G
96.1 Full
All tapes and Drives are LTO4, TSM Server 553 for AIX.
The devc are configured as:
Device Class Name: TS3310
Device Access Strategy: Sequential
Storage Pool Count: 16
Device Type: LTO
Format: ULTRIUM4C
Est/Max Capacity (MB):
Mount Limit: DRIVES
Mount Wait (min): 60
Mount Retention (min): 60
Label Prefix: ADSM
Library: TS3310
Directory:
Server Name:
Retry Period:
Retry Interval:
Shared:
High-level Address:
Minimum Capacity:
WORM: No
Drive Encryption: Off
Scaled Capacity:
Last Update by (administrator): ADM
Last Update Date/Time: 07/27/09 17:32:05
Cumprimentos / Best regards
Tiago Botelho
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