[gpfsug-discuss] SMB share size on disk Windows

L.walid (PowerM) l.walid at powerm.ma
Thu May 23 02:00:17 BST 2019


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) <l.walid at powerm.ma> 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.walid at powerm.ma <y.largou at 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.walid at powerm.ma <y.largou at 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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