Re: [gpfsug-discuss] SMB share size on disk Windows

2019-05-22 Thread Christof Schmitt 
The parameter 'allocation roundup size' was introduced in Samba backin 2005. Since then the world has moved on to SMB2 and SMB3. It is notclear whether this has any performance benefits these days. Also withSamba in Scale, the only effect is that the reported allocation sizeis rounded up, but the space is not actually allocated.
See also https://lists.samba.org/archive/samba-technical/2016-July/115172.htmlfor an additional comment:
 
|Allocation roundup size actually was a performance win back|in the day (SMB1). Reporting it as larger (1MB) caused the|SMB1 client to issue larger read requests against Samba than|it did against a Windows server which reported the NTFS|allocation extent.||In the world of SMB2, not sure how much it's needed anymore.
 
You can change this parameter for a test to get consistent reportingof used space:
 
/usr/lpp/mmfs/bin/net conf setparm global 'allocation roundup size' 0
 
In case there is a problem, remove it again to revert back to thedefault:
 
/usr/lpp/mmfs/bin/net conf delparm global 'allocation roundup size'
 
Regards,
 
Christof Schmitt || IBM || Spectrum Scale Development || Tucson, AZchristof.schm...@us.ibm.com  ||  +1-520-799-2469    (T/L: 321-2469)
 
 
- Original message -From: "L.walid (PowerM)" Sent by: gpfsug-discuss-boun...@spectrumscale.orgTo: "gpfsug-discuss@spectrumscale.org" Cc:Subject: [EXTERNAL] Re: [gpfsug-discuss] SMB share size on disk WindowsDate: Wed, May 22, 2019 6:01 PM 
Hi Everyone,
 
Through some research, i found it's a normal behavior related to Samba "allocation roundup size" , since CES SMB is based on Samba that explains the behavior. (Windows assumes that the default size for a block is 1M).
As such, i found somewhere else that changing this parameter can decrease performance, so if possible to advise on this. For the block size on the filesystem i would still go with 256k since it's the recommended for File Serving use cases.
 
Thank you
 
References : 
https://lists.samba.org/archive/samba-technical/2016-July/115166.html  

On Wed, May 22, 2019 at 11:59 PM L.walid (PowerM)  wrote:
Hi,
 
We are contacting you regarding a behavior observed for our customer gpfs smb shares. When we try to view the file/folder properties, the values reported are significantly different from the folder/size and the folder/file size on disk.
 
We tried to reproduce with creating a simple text file of 1ko and when we check the properties of the file it was a 1Mo on disk! 
 
I tried changing the block size of the fs from 4M to 256k , but still the same results 
 
Thank you --

Best regards, 
 
Walid Largou
Senior IT Specialist
Power Maroc
Mobile : +212 621 31 98 71
Email: l.wa...@powerm.ma
320 Bd Zertouni 6th Floor, Casablanca, Morocco
https://www.powerm.maThis message is confidential .Its contents do not constitute a commitment by Power Maroc S.A.R.L except where provided for in a written agreement between you and Power Maroc S.A.R.L. Any authorized disclosure, use or dissemination, either whole or partial, is prohibited. If you are not the intended recipient of the message, please notify the sender immediately. 

 --

Best regards, 
 
Walid Largou
Senior IT Specialist
Power Maroc
Mobile : +212 621 31 98 71
Email: l.wa...@powerm.ma
320 Bd Zertouni 6th Floor, Casablanca, Morocco
https://www.powerm.maThis message is confidential .Its contents do not constitute a commitment by Power Maroc S.A.R.L except where provided for in a written agreement between you and Power Maroc S.A.R.L. Any authorized disclosure, use or dissemination, either whole or partial, is prohibited. If you are not the intended recipient of the message, please notify the sender immediately.
 
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Re: [gpfsug-discuss] SMB share size on disk Windows

2019-05-22 Thread L.walid (PowerM) 
Hi Everyone,

Through some research, i found it's a normal behavior related to Samba
"allocation roundup size" , since CES SMB is based on Samba that explains
the behavior. (Windows assumes that the default size for a block is 1M).
As such, i found somewhere else that changing this parameter can decrease
performance, so if possible to advise on this. For the block size on the
filesystem i would still go with 256k since it's the recommended for File
Serving use cases.

Thank you

References :
https://lists.samba.org/archive/samba-technical/2016-July/115166.html

On Wed, May 22, 2019 at 11:59 PM L.walid (PowerM)  wrote:

> Hi,
>
> We are contacting you regarding a behavior observed for our customer gpfs
> smb shares. When we try to view the file/folder properties, the values
> reported are significantly different from the folder/size and the
> folder/file size on disk.
>
> We tried to reproduce with creating a simple text file of 1ko and when we
> check the properties of the file it was a 1Mo on disk!
>
> I tried changing the block size of the fs from 4M to 256k , but still the
> same results
>
> Thank you
> --
> Best regards,
>
> Walid Largou
> Senior IT Specialist
> Power Maroc
> Mobile : +212 62 <+212%20661%2015%2021%2055>1 31 98 71
> Email: l.wa...@powerm.ma 
> 320 Bd Zertouni 6th Floor, Casablanca, Morocco
> https://www.powerm.ma
>
>
> This message is confidential .Its contents do not constitute a commitment
> by Power Maroc S.A.R.L except where provided for in a written agreement
> between you and Power Maroc S.A.R.L. Any authorized disclosure, use or
> dissemination, either whole or partial, is prohibited. If you are not the
> intended recipient of the message, please notify the sender immediately.
>


-- 
Best regards,

Walid Largou
Senior IT Specialist
Power Maroc
Mobile : +212 62 <+212%20661%2015%2021%2055>1 31 98 71
Email: l.wa...@powerm.ma 
320 Bd Zertouni 6th Floor, Casablanca, Morocco
https://www.powerm.ma


This message is confidential .Its contents do not constitute a commitment
by Power Maroc S.A.R.L except where provided for in a written agreement
between you and Power Maroc S.A.R.L. Any authorized disclosure, use or
dissemination, either whole or partial, is prohibited. If you are not the
intended recipient of the message, please notify the sender immediately.
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[gpfsug-discuss] SMB share size on disk Windows

2019-05-22 Thread L.walid (PowerM) 
Hi,

We are contacting you regarding a behavior observed for our customer gpfs
smb shares. When we try to view the file/folder properties, the values
reported are significantly different from the folder/size and the
folder/file size on disk.

We tried to reproduce with creating a simple text file of 1ko and when we
check the properties of the file it was a 1Mo on disk!

I tried changing the block size of the fs from 4M to 256k , but still the
same results

Thank you
-- 
Best regards,

Walid Largou
Senior IT Specialist
Power Maroc
Mobile : +212 62 <+212%20661%2015%2021%2055>1 31 98 71
Email: l.wa...@powerm.ma 
320 Bd Zertouni 6th Floor, Casablanca, Morocco
https://www.powerm.ma


This message is confidential .Its contents do not constitute a commitment
by Power Maroc S.A.R.L except where provided for in a written agreement
between you and Power Maroc S.A.R.L. Any authorized disclosure, use or
dissemination, either whole or partial, is prohibited. If you are not the
intended recipient of the message, please notify the sender immediately.
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gpfsug-discuss mailing list
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