[Ocfs2-devel] vmstore option - mkfs

[Sunil Mushran]

Yes. But this is just the features. It also selects the appropriate cluster size, block size,
journal size, etc. All the params selected are printed by mkfs. You also have the option of
running with the --dry-option to see the params.

On 11/16/2011 09:41 AM, Artur Baruchi wrote:
> I just found this:
>
> +	{OCFS2_FEATURE_COMPAT_BACKUP_SB | OCFS2_FEATURE_COMPAT_JBD2_SB,
> +	 OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC |
> +	 OCFS2_FEATURE_INCOMPAT_INLINE_DATA |
> +	 OCFS2_FEATURE_INCOMPAT_XATTR |
> +	 OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE,
> +	 OCFS2_FEATURE_RO_COMPAT_UNWRITTEN},  /* FS_VMSTORE */
>
> These options are the ones that, when choosing for vmstore, are
> enabled by default. Is this correct?
>
> Thanks.
>
> Att.
> Artur Baruchi
>
>
>
> On Wed, Nov 16, 2011 at 3:26 PM, Sunil Mushran<sunil.mushran at oracle.com>  wrote:
>> fstype is a handy way to format the volume with parameters that are thought
>> to be useful for that use-case. The result of this is printed during format
>> by
>> way of the parameters selected. man mkfs.ocfs2 has a blurb about the
>> features
>> it enabled by default.
>>
>> On 11/16/2011 08:45 AM, Artur Baruchi wrote:
>>> Hi.
>>>
>>> I tried to find some information about the option vmstore when
>>> formating a device, but didnt found anything about it (no
>>> documentation, I did some greps inside the source code, but nothing
>>> returned). My doubts about this:
>>>
>>> - What kind of optimization this option creates in my file system to
>>> store vm images? I mean.. what does exactly this option do?
>>> - Where, in source code, I can find the part that makes this optimization?
>>>
>>> Thanks in advance.
>>>
>>> Att.
>>> Artur Baruchi
>>>
>>