Re: backup performance with db and log on a SAN
2002-09-02 11:09:40
On maandag, september 2, 2002, at 01:49 , Daniel Sparrman wrote:
Hi Eliza
As I understand it, each "tape-HBA" has 3 3590E FC connnected to it. The
two 21G database disks, are each connected to it's own HBA?
According to spec sheets, the 3590E FC could handle speed up to 100MB/s
with 3:1 compression. This means that with 3 drives, you could have up
to
300MB/s. However, the HBA will only theoretically handle 125MB/s, or
250MB/s with 2Gb FC.
Fortunately, an 3590E will do only about 16MB/s or so, so 3 drives will
not fill up a FC link.... 3:1 compression is very rare in my experience,
2:1 or less is far more likely...
---
Met vriendelijke groeten,
Remco Post
SARA - Stichting Academisch Rekencentrum Amsterdam http://www.sara.nl
High Performance Computing Tel. +31 20 592 8008 Fax. +31 20 668 3167
PGP keys at http://home.sara.nl/~remco/keys.asc
"I really didn't foresee the Internet. But then, neither did the computer
industry. Not that that tells us very much of course - the computer
industry
didn't even foresee that the century was going to end." -- Douglas Adams
|
<Prev in Thread] |
Current Thread |
[Next in Thread>
|
- Re: backup performance with db and log on a SAN, Roger Deschner
- Re: backup performance with db and log on a SAN, Seay, Paul
- Re: backup performance with db and log on a SAN, Eliza Lau
- Re: backup performance with db and log on a SAN, Eliza Lau
- Re: backup performance with db and log on a SAN, Daniel Sparrman
- Re: backup performance with db and log on a SAN,
Remco Post <=
- Re: backup performance with db and log on a SAN, Eliza Lau
- Re: backup performance with db and log on a SAN, Seay, Paul
- Re: backup performance with db and log on a SAN, Remco Post
- Re: backup performance with db and log on a SAN, Daniel Sparrman
- Re: backup performance with db and log on a SAN, Eliza Lau
- Re: backup performance with db and log on a SAN, Roger Deschner
- Re: backup performance with db and log on a SAN, Zlatko Krastev/ACIT
|
|
|