Mailing List Archive: Netapp: toasters

Determining the current 'snapmirror throttle' value?

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john.stoffel at taec

Nov 9, 2009, 12:47 PM

Post #1 of 20 (7257 views)
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Determining the current 'snapmirror throttle' value?

Guys,

Does anyone know how to determine what the current setting of
'snapmirror throttle N destination' actually is? I've tried looking
at the output of:

snapmirror status -l
snapmirror throttle

We're looking to dynamically throttle and un-throttle connections, and
it would be nice to confirm what the actual setting is without have to
guess and just set the value blindly.

We're running 7.2.6.1 and moving to 7.3.1.1 soon, or something newer.

Thanks,
John
John Stoffel - Senior Staff Systems Administrator - System LSI Group
Toshiba America Electronic Components, Inc. - http://www.toshiba.com/taec
john.stoffel [at] taec - 508-486-1087

john.stoffel at taec

Nov 9, 2009, 12:47 PM

Post #2 of 20 (7041 views)
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Determining the current 'snapmirror throttle' value? [In reply to]

john.stoffel at taec

Nov 9, 2009, 12:47 PM

Post #3 of 20 (7043 views)
Permalink

Determining the current 'snapmirror throttle' value? [In reply to]

john.stoffel at taec

Nov 9, 2009, 12:47 PM

Post #4 of 20 (7040 views)
Permalink

Determining the current 'snapmirror throttle' value? [In reply to]

john.stoffel at taec

Nov 9, 2009, 12:47 PM

Post #5 of 20 (7002 views)
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Determining the current 'snapmirror throttle' value? [In reply to]

john.stoffel at taec

Nov 9, 2009, 2:09 PM

Post #6 of 20 (7083 views)
Permalink

Re: Determining the current 'snapmirror throttle' value? [In reply to]

>>>>> "John" == John Stoffel <john.stoffel [at] taec> writes:

John> Guys,

John> Does anyone know how to determine what the current setting of
John> 'snapmirror throttle N destination' actually is? I've tried looking
John> at the output of:

John> snapmirror status -l
John> snapmirror throttle

John> We're looking to dynamically throttle and un-throttle connections, and
John> it would be nice to confirm what the actual setting is without have to
John> guess and just set the value blindly.

John> We're running 7.2.6.1 and moving to 7.3.1.1 soon, or something newer.

I guess I wasn't quite clear enough in my request. Let me backup a
bit and clarify.

- We're running multiple snapmirrors from filerA to filerB.
- I have all my volumes configured with kbs=2000 in snapmirror.conf
- I need to dynamically limit the per-volume bandwidth, mostly to just
unlimit the transfer rate for each volume at certain times of the day.

I can just do:

snapmirror throttle 0 <volume>

without a problem. But without looking at the log file
(/vol/root/etc/log/snapmirror) I can't tell what the *current*
snapmirror throttle setting is as a check.

Some people have pointed out the 'options replication.throttle.enable'
option, but that's a system-wide setting, not a per-volume setting.

Though I admit it might be better to limit the system's max-bandwith,
instead of individual bandwidth settings. Esp since I just want to
limit network impact during the production hours on weekdays. So this
replication limit might work quite well for this.

So while it doesn't answer my question directly, it might just be the
answer I need.

Thanks,
John

Stetson.Webster at netapp

Nov 9, 2009, 2:09 PM

Post #7 of 20 (7075 views)
Permalink

RE: Determining the current 'snapmirror throttle' value? [In reply to]

Not exactly your specific question, but this will take you there.

How to remove SnapMirror throttling on the fly:
https://now.netapp.com/Knowledgebase/solutionarea.asp?id=kb20418

Good luck.

Stetson Webster
Professional Services Consultant
Virtualization and Consolidation
NCIE-SAN, NCIE-B&R, SCSN-E, VCP
NetApp
919.250.0052 Direct Phone
stetson [at] netapp
Learn more: netapp.com/and
�

-----Original Message-----
From: John Stoffel [mailto:john.stoffel [at] taec]
Sent: Monday, November 09, 2009 3:48 PM
To: toasters [at] mathworks
Subject: Determining the current 'snapmirror throttle' value?

Guys,

Does anyone know how to determine what the current setting of
'snapmirror throttle N destination' actually is? I've tried looking
at the output of:

snapmirror status -l
snapmirror throttle

We're looking to dynamically throttle and un-throttle connections, and
it would be nice to confirm what the actual setting is without have to
guess and just set the value blindly.

We're running 7.2.6.1 and moving to 7.3.1.1 soon, or something newer.

Thanks,
John
John Stoffel - Senior Staff Systems Administrator - System LSI Group
Toshiba America Electronic Components, Inc. - http://www.toshiba.com/taec
john.stoffel [at] taec - 508-486-1087

Steven.Roach at netapp

Nov 9, 2009, 4:35 PM

Post #8 of 20 (7057 views)
Permalink

RE: Determining the current 'snapmirror throttle' value? [In reply to]

So based on that KB article doing the following from the command line should show what the throttle is set for:

NetApp:> rdfile /etc/snapmirror.conf

-----Original Message-----
From: Webster, Stetson
Sent: Monday, November 09, 2009 5:09 PM
To: John Stoffel; toasters [at] mathworks
Subject: RE: Determining the current 'snapmirror throttle' value?

Not exactly your specific question, but this will take you there.

How to remove SnapMirror throttling on the fly:
https://now.netapp.com/Knowledgebase/solutionarea.asp?id=kb20418

Good luck.

Stetson Webster
Professional Services Consultant
Virtualization and Consolidation
NCIE-SAN, NCIE-B&R, SCSN-E, VCP
NetApp
919.250.0052 Direct Phone
stetson [at] netapp
Learn more: netapp.com/and
�

-----Original Message-----
From: John Stoffel [mailto:john.stoffel [at] taec]
Sent: Monday, November 09, 2009 3:48 PM
To: toasters [at] mathworks
Subject: Determining the current 'snapmirror throttle' value?

Guys,

Does anyone know how to determine what the current setting of
'snapmirror throttle N destination' actually is? I've tried looking
at the output of:

snapmirror status -l
snapmirror throttle

We're looking to dynamically throttle and un-throttle connections, and
it would be nice to confirm what the actual setting is without have to
guess and just set the value blindly.

We're running 7.2.6.1 and moving to 7.3.1.1 soon, or something newer.

Thanks,
John
John Stoffel - Senior Staff Systems Administrator - System LSI Group
Toshiba America Electronic Components, Inc. - http://www.toshiba.com/taec
john.stoffel [at] taec - 508-486-1087

Steven.Roach at netapp

Nov 9, 2009, 4:35 PM

Post #9 of 20 (7042 views)
Permalink

RE: Determining the current 'snapmirror throttle' value? [In reply to]

Steven.Roach at netapp

Nov 9, 2009, 4:35 PM

Post #10 of 20 (7045 views)
Permalink

RE: Determining the current 'snapmirror throttle' value? [In reply to]

Steven.Roach at netapp

Nov 9, 2009, 4:35 PM

Post #11 of 20 (7042 views)
Permalink

RE: Determining the current 'snapmirror throttle' value? [In reply to]

Steven.Roach at netapp

Nov 9, 2009, 4:35 PM

Post #12 of 20 (7046 views)
Permalink

RE: Determining the current 'snapmirror throttle' value? [In reply to]

gtchen at yahoo-inc

Nov 9, 2009, 4:58 PM

Post #13 of 20 (7058 views)
Permalink

Re: Determining the current 'snapmirror throttle' value? [In reply to]

That only works if the snapmirror was scheduled. If it was started manually (or a scheduled snapmirror was aborted and restarted manually) I don't know of any way to determine the speed. On the other hand, the /etc/log/auditlog* contains the manually executed commands, and should go back at least 5 weeks, so the command should be in there.

On 11/9/09 4:35 PM, "Roach, Steve" <Steven.Roach [at] netapp> wrote:

So based on that KB article doing the following from the command line should show what the throttle is set for:

NetApp:> rdfile /etc/snapmirror.conf

-----Original Message-----
From: Webster, Stetson
Sent: Monday, November 09, 2009 5:09 PM
To: John Stoffel; toasters [at] mathworks
Subject: RE: Determining the current 'snapmirror throttle' value?

Not exactly your specific question, but this will take you there.

How to remove SnapMirror throttling on the fly:
https://now.netapp.com/Knowledgebase/solutionarea.asp?id=kb20418

Good luck.

Stetson Webster
Professional Services Consultant
Virtualization and Consolidation
NCIE-SAN, NCIE-B&R, SCSN-E, VCP
NetApp
919.250.0052 Direct Phone
stetson [at] netapp
Learn more: netapp.com/and

-----Original Message-----
From: John Stoffel [mailto:john.stoffel [at] taec]
Sent: Monday, November 09, 2009 3:48 PM
To: toasters [at] mathworks
Subject: Determining the current 'snapmirror throttle' value?

Guys,

Does anyone know how to determine what the current setting of
'snapmirror throttle N destination' actually is? I've tried looking
at the output of:

snapmirror status -l
snapmirror throttle

We're looking to dynamically throttle and un-throttle connections, and
it would be nice to confirm what the actual setting is without have to
guess and just set the value blindly.

We're running 7.2.6.1 and moving to 7.3.1.1 soon, or something newer.

Thanks,
John
John Stoffel - Senior Staff Systems Administrator - System LSI Group
Toshiba America Electronic Components, Inc. - http://www.toshiba.com/taec
john.stoffel [at] taec - 508-486-1087

gtchen at yahoo-inc

Nov 9, 2009, 4:58 PM

Post #14 of 20 (7038 views)
Permalink

Re: Determining the current 'snapmirror throttle' value? [In reply to]

gtchen at yahoo-inc

Nov 9, 2009, 4:58 PM

Post #15 of 20 (7046 views)
Permalink

Re: Determining the current 'snapmirror throttle' value? [In reply to]

gtchen at yahoo-inc

Nov 9, 2009, 4:58 PM

Post #16 of 20 (7040 views)
Permalink

Re: Determining the current 'snapmirror throttle' value? [In reply to]

olaf at netapp

Nov 12, 2009, 7:26 AM

Post #17 of 20 (6950 views)
Permalink

RE: Determining the current 'snapmirror throttle' value? [In reply to]

Perhaps a silly question, but if "you" are doing the throttle
change, then why are you not logging that yourself for future
reference ?
Script the thing (perl, sh, whatever).

Another thing to look at: divide amount transferred by current transfer
time.

Olaf Leimann
Escalations Engineer
EMEA Escalations

NetApp
00800-44-638277 EMEA Toll-free
1-877-2638277 USA Toll-free
olaf [at] netapp
now.netapp.com

-----Original Message-----
From: John Stoffel [mailto:john.stoffel [at] taec]
Sent: maandag 9 november 2009 21:48
To: toasters [at] mathworks
Subject: Determining the current 'snapmirror throttle' value?

Guys,

Does anyone know how to determine what the current setting of
'snapmirror throttle N destination' actually is? I've tried looking
at the output of:

snapmirror status -l
snapmirror throttle

We're looking to dynamically throttle and un-throttle connections, and
it would be nice to confirm what the actual setting is without have to
guess and just set the value blindly.

We're running 7.2.6.1 and moving to 7.3.1.1 soon, or something newer.

Thanks,
John
John Stoffel - Senior Staff Systems Administrator - System LSI Group
Toshiba America Electronic Components, Inc. -
http://www.toshiba.com/taec
john.stoffel [at] taec - 508-486-1087

john.stoffel at taec

Nov 12, 2009, 7:34 AM

Post #18 of 20 (6945 views)
Permalink

RE: Determining the current 'snapmirror throttle' value? [In reply to]

Leimann> Perhaps a silly question, but if "you" are doing the throttle
Leimann> change, then why are you not logging that yourself for future
Leimann> reference ? Script the thing (perl, sh, whatever).

Yeah, it is a silly question. Let me push back on you, why can't
NetApp *tell* me what the current limit is? What's so hard about:

snapmirror throttle -q [<dest>]

or something like that? My issue is that if sysadmin A makes a
change, then script B makes another change, then sysadmin C want's to
confirm the settings... it's just not possible. The only current
answer is to just re-do your 'snapmirror throttle N <dest>' commands
to force things to be what you expect.

Leimann> Another thing to look at: divide amount transferred by
Leimann> current transfer time.

Sure, I guess I could pull that out with a perl script to parse the
snapmirror status -v output and do the math. But that only gives the
number over the lifetime of that transfer. And if the throttle will
work on on-going transfers, it doesn't help me because I could have a
multi-day transfer that gets throttled during work hours, then
un-throttled at night, and throttled again the next time.

So the transfer rate will change and the number you propose I use
won't help.

Thanks,
John
John Stoffel - Senior Staff Systems Administrator - System LSI Group
Toshiba America Electronic Components, Inc. - http://www.toshiba.com/taec
john.stoffel [at] taec - 508-486-1087

Rich.Borders at netapp

Nov 12, 2009, 7:57 AM

Post #19 of 20 (6936 views)
Permalink

RE: Determining the current 'snapmirror throttle' value? [In reply to]

Sounds like an RFE for me.

Richard D Borders
CPR Escalations Engineer
RTP, North Carolina USA - NetApp, Inc.
Email: rborders [at] netapp
Phone:(919) 476-5236
Cell: (919) 757 3727

> -----Original Message-----
> From: John Stoffel [mailto:john.stoffel [at] taec]
> Sent: Thursday, November 12, 2009 10:34 AM
> To: Leimann, Olaf
> Cc: John Stoffel; toasters [at] mathworks
> Subject: RE: Determining the current 'snapmirror throttle' value?
>
>
> Leimann> Perhaps a silly question, but if "you" are doing the throttle
> Leimann> change, then why are you not logging that yourself for future
> Leimann> reference ? Script the thing (perl, sh, whatever).
>
> Yeah, it is a silly question. Let me push back on you, why can't
> NetApp *tell* me what the current limit is? What's so hard about:
>
> snapmirror throttle -q [<dest>]
>
> or something like that? My issue is that if sysadmin A makes a
> change, then script B makes another change, then sysadmin C want's to
> confirm the settings... it's just not possible. The only current
> answer is to just re-do your 'snapmirror throttle N <dest>' commands
> to force things to be what you expect.
>
> Leimann> Another thing to look at: divide amount transferred by
> Leimann> current transfer time.
>
> Sure, I guess I could pull that out with a perl script to parse the
> snapmirror status -v output and do the math. But that only gives the
> number over the lifetime of that transfer. And if the throttle will
> work on on-going transfers, it doesn't help me because I could have a
> multi-day transfer that gets throttled during work hours, then
> un-throttled at night, and throttled again the next time.
>
> So the transfer rate will change and the number you propose I use
> won't help.
>
> Thanks,
> John
> John Stoffel - Senior Staff Systems Administrator - System LSI
> Group
> Toshiba America Electronic Components, Inc. -
> http://www.toshiba.com/taec
> john.stoffel [at] taec - 508-486-1087

olaf at netapp

Nov 13, 2009, 2:34 AM

Post #20 of 20 (6895 views)
Permalink

RE: Determining the current 'snapmirror throttle' value? [In reply to]

You could open a case and ask for it to be linked to "Bug" number
315117.

It has only one customer attached to it yet (not TEAC), and as
an RFE may not see the light for a while (unless you're willing
to pay for it through Sales: a PVR).
Also, it's not public yet, but I'll give you the header info here:

id 315117
title RFE for the ability to issue command to see
current snapmirror throttle setting
state NEW

Current target ONTAP is 8.1, but not confirmed.

HOWEVER...

There is also a global throttle option since 7.2RC1:
<http://now.netapp.com/NOW/knowledge/docs/ontap/rel727/html/ontap/cmdref
/man1/na_options.1.htm>
-------------------------
replication.throttle.enable

Enables global network throttling of snapmirror and snapvault transfers.
The default value for this options is off.
-------------------------

This means you can schedule your bandwidth for all SnapMirror/SnapVault
transfers in one go.

Cheers,
Olaf Leimann
Escalations Engineer
EMEA Escalations

NetApp
00800-44-638277 EMEA Toll-free
1-877-2638277 USA Toll-free
olaf [at] netapp
now.netapp.com

-----Original Message-----
From: John Stoffel [mailto:john.stoffel [at] taec]
Sent: donderdag 12 november 2009 16:34
To: Leimann, Olaf
Cc: John Stoffel; toasters [at] mathworks
Subject: RE: Determining the current 'snapmirror throttle' value?

Leimann> Perhaps a silly question, but if "you" are doing the throttle
Leimann> change, then why are you not logging that yourself for future
Leimann> reference ? Script the thing (perl, sh, whatever).

Yeah, it is a silly question. Let me push back on you, why can't
NetApp *tell* me what the current limit is? What's so hard about:

snapmirror throttle -q [<dest>]

or something like that? My issue is that if sysadmin A makes a
change, then script B makes another change, then sysadmin C want's to
confirm the settings... it's just not possible. The only current
answer is to just re-do your 'snapmirror throttle N <dest>' commands
to force things to be what you expect.

Leimann> Another thing to look at: divide amount transferred by
Leimann> current transfer time.

Sure, I guess I could pull that out with a perl script to parse the
snapmirror status -v output and do the math. But that only gives the
number over the lifetime of that transfer. And if the throttle will
work on on-going transfers, it doesn't help me because I could have a
multi-day transfer that gets throttled during work hours, then
un-throttled at night, and throttled again the next time.

So the transfer rate will change and the number you propose I use
won't help.

Thanks,
John
John Stoffel - Senior Staff Systems Administrator - System LSI Group
Toshiba America Electronic Components, Inc. -
http://www.toshiba.com/taec
john.stoffel [at] taec - 508-486-1087

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