Hammer filesystem removal of a file.

Rohit Menon rohit.forum33 at gmail.com
Thu Nov 20 20:11:22 PST 2014

Hello Justin,

That makes things a bit more clear now.
Since its a read-only filesystem how am I supposed to do that
Also I tried mounting the filesystem nohistory the data is still shows used
So does this mean I cannot remove this history.

On Fri, Nov 21, 2014 at 6:20 AM, Justin Sherrill <justin at shiningsilence.com>

> What you are looking at is file history.  Snapshots are moments in time of
> the entire volume.  File history is a record of every change synced to
> disk.  From hammer(5):
> If you've removed snapshots and pruned, it should have removed a great
> deal of the data.  File history since the last snapshot is preserved,
> though.  If you don't want any history kept, mount the Hammer volume
> nohistory.  (see mount_hammer(8) )
> It will always be read-only because it's history; it already happened.  If
> you want to modify the files, you will need to copy them out and then
> modify them on the "now" version of the filesystem.
> On Thu, Nov 20, 2014 at 7:28 AM, Rohit Menon <rohit.forum33 at gmail.com>
> wrote:
>> Hello Antonio,
>> I have removed all the snapshots of the volume.
>> This has been done as documented that is hammer snapls and then
>> prune-everything.
>> I have noticed a peculiar behaviour though.
>> Im able to generate a transaction Id using hammer synctid
>> When I cd to the directory that is /Backup5/@@0x0000000108329000
>> Im able to see the data but cannot remove it as it is a read-only
>> filesystem.
>> I tried to null mount this and remove it to no avail.
>> Is there something Im still missing.
>> On Wed, Nov 19, 2014 at 5:17 PM, Antonio Huete Jiménez <
>> tuxillo at quantumachine.net> wrote:
>>> Hi Rohit,
>>> There must be a snapshot referencing those files and that is the reason
>>> why they keep using the space.
>>> Check hammer(8) manpage on how to operate snapshots.
>>> Best regards,
>>> Antonio Huete
>>> Quoting Rohit Menon <rohit.forum33 at gmail.com>:
>>>  Hello,
>>>> Im a newbie to BSD as a whole.
>>>> Currently my company has a backup solution implemented in dragonfly BSD
>>>> with hammer.
>>>> My question is simple, is there a specific way to remove a file/folder
>>>> in
>>>> hammer.
>>>> The situation is like:
>>>> I moved 65G data to one of my directoies /Backup under a specifc
>>>> directory.
>>>> When I removed it the the files and folders have been removed but the
>>>> occupied space remains.
>>>> I have done hammer cleanup and prune but to no avail.
>>>> Can you please guide me on where Im going wrong.
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