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Re:Backup Speed is slower Dell Powervault TL4000,Qlogic Fibre Channel Adapter and Widows 2003 Std
We only get 700 MB/Min average speed about backup 30 GB files from local HD to Tape Lib.
I discoed some settings on QLogic Fibre Channel Card, but I am not sure do I need to config that?
Please help
Thanks
Alex
Device-Setting.JPG
DLT4000.JPG
Qlogic-Setting.JPG
I discoed some settings on QLogic Fibre Channel Card, but I am not sure do I need to config that?
Please help
Thanks
Alex
Device-Setting.JPG
DLT4000.JPG
Qlogic-Setting.JPG
ASKER
Is the SAN 1, 2, or 4gb?
4Gb/s
What is the average file size?
0.51MB
How many files are being backed up?
3,300,840
Is one or two backups running at the same time?
2 Backups
How much RAM does the server have?
2GB RAM.
What type of files are being backed up? or in other words is the data compressed or binary that compresses little such as zip, jpg, mp3, etc.
Office files, jpg, vob, db etc.
4Gb/s
What is the average file size?
0.51MB
How many files are being backed up?
3,300,840
Is one or two backups running at the same time?
2 Backups
How much RAM does the server have?
2GB RAM.
What type of files are being backed up? or in other words is the data compressed or binary that compresses little such as zip, jpg, mp3, etc.
Office files, jpg, vob, db etc.
4gb should support well more than 700mb/m.
file size and # is going to add significant overhead and will be a limiting factor
2 bkups so double the resources is needed
and so 2gb might not be enough
those compressed and binary files will also lower throughput
Start by running Task Manager to monitor memory and I/O while the backups are running. Once open go to the Processes tab and then View Select Columns to add additional objects.
Based off that you can tell if it will benefit more RAM.
If possible, consider configuring so each HBA sees one of the tape drives. Often this will help as well.
Check to see if your backup application supports multiplexing. That is where multiple sessions are written to the same tape at the same time.
Check the virus detection program scans outgoing files or file reads. This can also effect throughput.
As a test setup at least 5gb of data, the bigger the files the better. Then run just one backup job to see if it has a significantly higher throughput.
How about at the library end. Is it also 4gb? Ooo what if it is only 1gb, then you have two jobs sharing that one 1gb connection and that could be the cause. It is probably a good idea to add that second port so you have one for each drive.
file size and # is going to add significant overhead and will be a limiting factor
2 bkups so double the resources is needed
and so 2gb might not be enough
those compressed and binary files will also lower throughput
Start by running Task Manager to monitor memory and I/O while the backups are running. Once open go to the Processes tab and then View Select Columns to add additional objects.
Based off that you can tell if it will benefit more RAM.
If possible, consider configuring so each HBA sees one of the tape drives. Often this will help as well.
Check to see if your backup application supports multiplexing. That is where multiple sessions are written to the same tape at the same time.
Check the virus detection program scans outgoing files or file reads. This can also effect throughput.
As a test setup at least 5gb of data, the bigger the files the better. Then run just one backup job to see if it has a significantly higher throughput.
How about at the library end. Is it also 4gb? Ooo what if it is only 1gb, then you have two jobs sharing that one 1gb connection and that could be the cause. It is probably a good idea to add that second port so you have one for each drive.
ASKER
Each HBA only can see one of the tape drives.
We are using ARCServe 12.0 SP1 and it support multiplexing very well. We have run a test on a test backup server (same sever as live one) with SCSI Tape Drive. We can get 6000MB/MIN MAX Speed by LTO3, the test data size is 80GB total
We don't have Antivirus application on backup server.
The setup is auto speed, and it is 4Gb/s shows on drive status.
HBA.JPG
HBA-and-TAPE-LIB.JPG
We are using ARCServe 12.0 SP1 and it support multiplexing very well. We have run a test on a test backup server (same sever as live one) with SCSI Tape Drive. We can get 6000MB/MIN MAX Speed by LTO3, the test data size is 80GB total
We don't have Antivirus application on backup server.
The setup is auto speed, and it is 4Gb/s shows on drive status.
HBA.JPG
HBA-and-TAPE-LIB.JPG
ASKER
Hi there.. any suggestions please?
ASKER CERTIFIED SOLUTION
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What is the average file size?
How many files are being backed up?
Is one or two backups running at the same time?
How much RAM does the server have?
What type of files are being backed up?
or in other words is the data compressed or binary that compresses little such as zip, jpg, mp3, etc.