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After CFS has been stopped, CNS may also be stopped using the following command:

$ /etc/init.d/caringo-cns stop

3.3. Timescapes

The DX Storage CFS Timescape continuous snapshot feature allows an administrator to mount a

historical, read-only view of a file system at any past time, providing a mechanism to both view and/

or copy previous versions of files that might otherwise be lost.

To utilize the feature, you must first create a timescape mount at the point in time you would like to

view, using the cfs-admin mktimescape script. The script can be initiated by running the following

command:

sudo cfs-admin mktimescape --add

This will bring up a wizard similar to the ones used to initially create a CFS share that will collect the

information necessary to create the timescape mount. It includes the following prompts:

TCFSID to be used for this timescape mount: Enter a name for the timescape mountpoint.

It must be unique on each server and consist of letters and numbers without punctuation or

spaces. For example: "acctShareT20100826" or "TimescapearchiveFS20100826".

CFSID of the CFS share you wish to make a timescape mount for: Enter the name of the

local CFS share for which you are creating a timescape mount. i.e. "acctShare" or "archiveFS"

from the initial installation example. The share must be on the same server as the timescape

mount you are creating to ensure the configuration data can be shared. The share must be in

existence for the entire time the timescape share is mounted for the timescape to work.

CFS mount directory path: Enter the location of the timescape mountpoint. By default, the

utility will use the previously provided TCFS ID in the /mnt directory. Spaces in mountpoint

paths are not supported.

Spooler directory path: Enter the location where the spooler/cache directory will reside. The

location must be unique for each distinct read/write TCFS ID or the filesystem mount will fail.

By default, the installer will use the previously provided TCFS ID in the /var/spool/cfs directory.

Extended attributes must be enabled on the specified spooler partition to store the lifepoints

and custom and system metadata associated with each unspooled item.

Warning

A dedicated spooler partition is required for each share to ensure space monitoring is

accurate and the local cache is properly maintained.

CFS Timescape (ISO8601 Format ex. 2010-08-26T13:47:42): Enter the time at which to

mount the filesystem specified in ISO 8601 format (ex. 9:38 am US/Pacific on 14 June, 2010

would be written 2010-06-14T09:38:00, with the date prior to T and the time following). The

local time zone offset of the DX Storage CFS server will be used. The wizard will return an

error if you attempt to configure a time period either earlier than the current time minus the

configured timescape horizon or in the future. A timescape share mounted when the configured

horizon passes may result in inconsistent results and an inability to access files that have been

garbage collected from the namespace while the share is mounted.

If the Spooler/cache and mount directories do not already exist, you will be asked if you would

like them to be created. The recommended response is 'Yes', as DX Storage CFS cannot

Version 2.6

February 2011