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тАО11-30-2004 03:49 AM
тАО11-30-2004 03:49 AM
VA7400: enable read cache using armmgr
VA7400 with firmware HP19
attached with 4 N-class 11.0 through 2 brocade switches.
A armdsp -a is attached
Hi,
It's known that the default configuration for a VA7400 disable the read cache.
I want to enable read cache and I want to know if this can be done online and if there is any consequences.
After reading man for armmgr, I still don't know if this can be done online. Does anyone has experience with this option??
-P Enable read ahead operation of LUNs being accessed.
-r Change the apparent state of read cache disabled
Which one should I use?
Regards,
William
attached with 4 N-class 11.0 through 2 brocade switches.
A armdsp -a is attached
Hi,
It's known that the default configuration for a VA7400 disable the read cache.
I want to enable read cache and I want to know if this can be done online and if there is any consequences.
After reading man for armmgr, I still don't know if this can be done online. Does anyone has experience with this option??
-P Enable read ahead operation of LUNs being accessed.
-r Change the apparent state of read cache disabled
Which one should I use?
Regards,
William
2 REPLIES 2
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тАО12-01-2004 04:30 AM
тАО12-01-2004 04:30 AM
Re: VA7400: enable read cache using armmgr
Read cache is enable by default. Look in armdsp:
Read Cache Disable:___________________False
Yeah, backward logic, but too negitives make a positive!
Read Cache Disable:___________________False
Yeah, backward logic, but too negitives make a positive!
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тАО12-02-2004 11:31 AM
тАО12-02-2004 11:31 AM
Re: VA7400: enable read cache using armmgr
Can anyone else comfirm this?
it sounds so unusal.
from armdsp:
Read Cache Disable:_______False
Write Cache Enable:_______True
Does it mean that both read and write cache are enable?
Is there otherway to determinate these? or test this?
I was doing some read/write test on this VA earlier in all kind of set up.
In any cases, write I/O is like 3 times higher / faster then read I/O
????? can anyone explain this??
regards,
William
it sounds so unusal.
from armdsp:
Read Cache Disable:_______False
Write Cache Enable:_______True
Does it mean that both read and write cache are enable?
Is there otherway to determinate these? or test this?
I was doing some read/write test on this VA earlier in all kind of set up.
In any cases, write I/O is like 3 times higher / faster then read I/O
????? can anyone explain this??
regards,
William
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