Monitor Speed of Writes to LTO3 - Veritas Net Backup
This is a discussion on Monitor Speed of Writes to LTO3 - Veritas Net Backup ; Hello,
We've moved from Legato to NBU and I'm trying to locate how to monitor the
speed of data being written to the LTO3 drives. It was possible to do this
in Legato. Is it possible with NBU?
TIA,
Joe...
-
Monitor Speed of Writes to LTO3
Hello,
We've moved from Legato to NBU and I'm trying to locate how to monitor the
speed of data being written to the LTO3 drives. It was possible to do this
in Legato. Is it possible with NBU?
TIA,
Joe
-
Re: Monitor Speed of Writes to LTO3
Hello Joe,
every Job contains information about the KB/sec.-Performance.
You can doubleclick on a job in the activity monitor or design in the layout
to show this column.
The number is not the absolut real datatransfer, it is the calculated worth
of "active elapsed time" and "kilobytes written".
bye
Para
"Joe" schrieb im Newsbeitrag
news:4676abdc@ROSASTDMZ05....
>
> Hello,
>
> We've moved from Legato to NBU and I'm trying to locate how to monitor the
> speed of data being written to the LTO3 drives. It was possible to do this
> in Legato. Is it possible with NBU?
>
> TIA,
>
> Joe
-
Re: Monitor Speed of Writes to LTO3
Thank Para,
I do see the KB/sec for jobs that write directly to tape, but with jobs that
are writing first to disk, then are duplicated to tape, there is nothing
in the KB/sec. In fact, in the operation column it just says "Mounting".
In the details for the job, I can see it start a bpdm process, then request
and mount a tape, then it starts a bptm process. Then a ton of these:
06/18/2007 20:18:37 - begin reading
06/18/2007 20:21:43 - end reading; read time: 0:03:06
06/18/2007 20:22:06 - started process bpdm (pid=344196)
06/18/2007 20:22:09 - begin reading
06/18/2007 20:22:48 - end reading; read time: 0:00:39
The estimated completion shows a percentage. It eventually gets to 100% then
finishes, starting the next dupe.
I never see anything about actually writing to tape, or a speed at which
it does.
Joe
"Paradoxin" wrote:
>Hello Joe,
>
>every Job contains information about the KB/sec.-Performance.
>You can doubleclick on a job in the activity monitor or design in the layout
>to show this column.
>
>The number is not the absolut real datatransfer, it is the calculated worth
>of "active elapsed time" and "kilobytes written".
>
>bye
>Para
>
>"Joe" schrieb im Newsbeitrag
>news:4676abdc@ROSASTDMZ05....
>>
>> Hello,
>>
>> We've moved from Legato to NBU and I'm trying to locate how to monitor
the
>> speed of data being written to the LTO3 drives. It was possible to do
this
>> in Legato. Is it possible with NBU?
>>
>> TIA,
>>
>> Joe
>
>
-
Re: Monitor Speed of Writes to LTO3
Hi Joe,
go to the activity monitor.
- rightclick in the list
- columns/layout
- Kilobytes/sec.
- Hide/Show
do you have this option?
bye
Para
"Joe" schrieb im Newsbeitrag
news:46773e45@ROSASTDMZ05....
>
> Thank Para,
>
> I do see the KB/sec for jobs that write directly to tape, but with jobs
that
> are writing first to disk, then are duplicated to tape, there is nothing
> in the KB/sec. In fact, in the operation column it just says "Mounting".
>
>
> In the details for the job, I can see it start a bpdm process, then
request
> and mount a tape, then it starts a bptm process. Then a ton of these:
>
> 06/18/2007 20:18:37 - begin reading
> 06/18/2007 20:21:43 - end reading; read time: 0:03:06
> 06/18/2007 20:22:06 - started process bpdm (pid=344196)
> 06/18/2007 20:22:09 - begin reading
> 06/18/2007 20:22:48 - end reading; read time: 0:00:39
>
> The estimated completion shows a percentage. It eventually gets to 100%
then
> finishes, starting the next dupe.
>
> I never see anything about actually writing to tape, or a speed at which
> it does.
>
> Joe
>
>
>
> "Paradoxin" wrote:
> >Hello Joe,
> >
> >every Job contains information about the KB/sec.-Performance.
> >You can doubleclick on a job in the activity monitor or design in the
layout
> >to show this column.
> >
> >The number is not the absolut real datatransfer, it is the calculated
worth
> >of "active elapsed time" and "kilobytes written".
> >
> >bye
> >Para
> >
> >"Joe" schrieb im Newsbeitrag
> >news:4676abdc@ROSASTDMZ05....
> >>
> >> Hello,
> >>
> >> We've moved from Legato to NBU and I'm trying to locate how to monitor
> the
> >> speed of data being written to the LTO3 drives. It was possible to do
> this
> >> in Legato. Is it possible with NBU?
> >>
> >> TIA,
> >>
> >> Joe
> >
> >
>
-
Re: Monitor Speed of Writes to LTO3
Yes, the column is there, but there is no value in that field.
Thanks again.
Joe
"Paradoxin" wrote:
>Hi Joe,
>
>go to the activity monitor.
>
>- rightclick in the list
>- columns/layout
>- Kilobytes/sec.
>- Hide/Show
>
>do you have this option?
>
>bye
>Para
>
>"Joe" schrieb im Newsbeitrag
>news:46773e45@ROSASTDMZ05....
>>
>> Thank Para,
>>
>> I do see the KB/sec for jobs that write directly to tape, but with jobs
>that
>> are writing first to disk, then are duplicated to tape, there is nothing
>> in the KB/sec. In fact, in the operation column it just says "Mounting".
>>
>>
>> In the details for the job, I can see it start a bpdm process, then
>request
>> and mount a tape, then it starts a bptm process. Then a ton of these:
>>
>> 06/18/2007 20:18:37 - begin reading
>> 06/18/2007 20:21:43 - end reading; read time: 0:03:06
>> 06/18/2007 20:22:06 - started process bpdm (pid=344196)
>> 06/18/2007 20:22:09 - begin reading
>> 06/18/2007 20:22:48 - end reading; read time: 0:00:39
>>
>> The estimated completion shows a percentage. It eventually gets to 100%
>then
>> finishes, starting the next dupe.
>>
>> I never see anything about actually writing to tape, or a speed at which
>> it does.
>>
>> Joe
>>
>>
>>
>> "Paradoxin" wrote:
>> >Hello Joe,
>> >
>> >every Job contains information about the KB/sec.-Performance.
>> >You can doubleclick on a job in the activity monitor or design in the
>layout
>> >to show this column.
>> >
>> >The number is not the absolut real datatransfer, it is the calculated
>worth
>> >of "active elapsed time" and "kilobytes written".
>> >
>> >bye
>> >Para
>> >
>> >"Joe" schrieb im Newsbeitrag
>> >news:4676abdc@ROSASTDMZ05....
>> >>
>> >> Hello,
>> >>
>> >> We've moved from Legato to NBU and I'm trying to locate how to monitor
>> the
>> >> speed of data being written to the LTO3 drives. It was possible to
do
>> this
>> >> in Legato. Is it possible with NBU?
>> >>
>> >> TIA,
>> >>
>> >> Joe
>> >
>> >
>>
>
>
-
Re: Monitor Speed of Writes to LTO3
Joe,
I didn't test this today, but I'm pretty certain that duplications don't
report the throughput that you're asking for. Your initial question didn't
say anything about duplications, so the original answer is correct - its
in the job properties, etc. But IIRC dpulications don't give the rate.
Yould could of course calculcate the rate from the time and size of the data
duplicated.
I imagine you are backing up to disk (staging) and then offloading to tape?
"Joe" wrote:
>
>Yes, the column is there, but there is no value in that field.
>
>Thanks again.
>
>Joe
>
>
>"Paradoxin" wrote:
>>Hi Joe,
>>
>>go to the activity monitor.
>>
>>- rightclick in the list
>>- columns/layout
>>- Kilobytes/sec.
>>- Hide/Show
>>
>>do you have this option?
>>
>>bye
>>Para
>>
>>"Joe" schrieb im Newsbeitrag
>>news:46773e45@ROSASTDMZ05....
>>>
>>> Thank Para,
>>>
>>> I do see the KB/sec for jobs that write directly to tape, but with jobs
>>that
>>> are writing first to disk, then are duplicated to tape, there is nothing
>>> in the KB/sec. In fact, in the operation column it just says "Mounting".
>>>
>>>
>>> In the details for the job, I can see it start a bpdm process, then
>>request
>>> and mount a tape, then it starts a bptm process. Then a ton of these:
>>>
>>> 06/18/2007 20:18:37 - begin reading
>>> 06/18/2007 20:21:43 - end reading; read time: 0:03:06
>>> 06/18/2007 20:22:06 - started process bpdm (pid=344196)
>>> 06/18/2007 20:22:09 - begin reading
>>> 06/18/2007 20:22:48 - end reading; read time: 0:00:39
>>>
>>> The estimated completion shows a percentage. It eventually gets to 100%
>>then
>>> finishes, starting the next dupe.
>>>
>>> I never see anything about actually writing to tape, or a speed at which
>>> it does.
>>>
>>> Joe
>>>
>>>
>>>
>>> "Paradoxin" wrote:
>>> >Hello Joe,
>>> >
>>> >every Job contains information about the KB/sec.-Performance.
>>> >You can doubleclick on a job in the activity monitor or design in the
>>layout
>>> >to show this column.
>>> >
>>> >The number is not the absolut real datatransfer, it is the calculated
>>worth
>>> >of "active elapsed time" and "kilobytes written".
>>> >
>>> >bye
>>> >Para
>>> >
>>> >"Joe" schrieb im Newsbeitrag
>>> >news:4676abdc@ROSASTDMZ05....
>>> >>
>>> >> Hello,
>>> >>
>>> >> We've moved from Legato to NBU and I'm trying to locate how to monitor
>>> the
>>> >> speed of data being written to the LTO3 drives. It was possible to
>do
>>> this
>>> >> in Legato. Is it possible with NBU?
>>> >>
>>> >> TIA,
>>> >>
>>> >> Joe
>>> >
>>> >
>>>
>>
>>
>
-
Re: Monitor Speed of Writes to LTO3
Yes. I am taling about disk staging to tape.
Also, I've been reading the Backup Planning and Performance Tuning Guide
trying to figure out the best way to manage the disk staging storage units.
I'm not sure what the best fragment size should be or is it better to have
many large storage units or many more smaller ones. Sorry, I know this digresses
from the original question, but are you aware of any other documents related
to disk storage units that you could recommend?
Thanks,
Joe
"Mike Robinson" wrote:
>
>Joe,
>
>I didn't test this today, but I'm pretty certain that duplications don't
>report the throughput that you're asking for. Your initial question didn't
>say anything about duplications, so the original answer is correct - its
>in the job properties, etc. But IIRC dpulications don't give the rate.
>
>Yould could of course calculcate the rate from the time and size of the
data
>duplicated.
>
>I imagine you are backing up to disk (staging) and then offloading to tape?
>
>"Joe" wrote:
>>
>>Yes, the column is there, but there is no value in that field.
>>
>>Thanks again.
>>
>>Joe
>>
>>
>>"Paradoxin" wrote:
>>>Hi Joe,
>>>
>>>go to the activity monitor.
>>>
>>>- rightclick in the list
>>>- columns/layout
>>>- Kilobytes/sec.
>>>- Hide/Show
>>>
>>>do you have this option?
>>>
>>>bye
>>>Para
>>>
>>>"Joe" schrieb im Newsbeitrag
>>>news:46773e45@ROSASTDMZ05....
>>>>
>>>> Thank Para,
>>>>
>>>> I do see the KB/sec for jobs that write directly to tape, but with jobs
>>>that
>>>> are writing first to disk, then are duplicated to tape, there is nothing
>>>> in the KB/sec. In fact, in the operation column it just says "Mounting".
>>>>
>>>>
>>>> In the details for the job, I can see it start a bpdm process, then
>>>request
>>>> and mount a tape, then it starts a bptm process. Then a ton of these:
>>>>
>>>> 06/18/2007 20:18:37 - begin reading
>>>> 06/18/2007 20:21:43 - end reading; read time: 0:03:06
>>>> 06/18/2007 20:22:06 - started process bpdm (pid=344196)
>>>> 06/18/2007 20:22:09 - begin reading
>>>> 06/18/2007 20:22:48 - end reading; read time: 0:00:39
>>>>
>>>> The estimated completion shows a percentage. It eventually gets to 100%
>>>then
>>>> finishes, starting the next dupe.
>>>>
>>>> I never see anything about actually writing to tape, or a speed at which
>>>> it does.
>>>>
>>>> Joe
>>>>
>>>>
>>>>
>>>> "Paradoxin" wrote:
>>>> >Hello Joe,
>>>> >
>>>> >every Job contains information about the KB/sec.-Performance.
>>>> >You can doubleclick on a job in the activity monitor or design in the
>>>layout
>>>> >to show this column.
>>>> >
>>>> >The number is not the absolut real datatransfer, it is the calculated
>>>worth
>>>> >of "active elapsed time" and "kilobytes written".
>>>> >
>>>> >bye
>>>> >Para
>>>> >
>>>> >"Joe" schrieb im Newsbeitrag
>>>> >news:4676abdc@ROSASTDMZ05....
>>>> >>
>>>> >> Hello,
>>>> >>
>>>> >> We've moved from Legato to NBU and I'm trying to locate how to monitor
>>>> the
>>>> >> speed of data being written to the LTO3 drives. It was possible to
>>do
>>>> this
>>>> >> in Legato. Is it possible with NBU?
>>>> >>
>>>> >> TIA,
>>>> >>
>>>> >> Joe
>>>> >
>>>> >
>>>>
>>>
>>>
>>
>
-
Re: Monitor Speed of Writes to LTO3
"Joe" wrote:
>
>Yes. I am taling about disk staging to tape.
>
>Also, I've been reading the Backup Planning and Performance Tuning Guide
>trying to figure out the best way to manage the disk staging storage units.
>
>
First, you should try going directly to tape. LTO3 is fast and you might
find staging not necessary (from a performance perspective). Why are you
staging - is it for performance, do you keep 5 days of data on the stage
(so you don't need the tapes mounted), etc? Do you send tapes offsite and
on what schedule, etc?
I have seen lots of articles saying D2D2T is the way to go, and then they
find it takes took long, etc.
What if you wrote inline copies, one to tape and one to disk, and expired
the disk after 5 days for example?
Also you can run the destaging multiple times throughout the day and it will
pick up anything "missed." Items don't go to tape twice. Lots of ways you
can set this up.
Use the perf tuning guide to break down the various components so you can
see where you are getting performance drops. Also you don't say what O/S
your media servers are, check into fragmentation issues on the staging disk.