Managing Caching
  • 23 Nov 2022
  • 3 Minutes to read
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Managing Caching

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When the CTERA Edge Filer is connected to a CTERA Portal, you can:

These operations are performed from the Cloud Drive page in the user interface.

  • In the Configuration view, select Cloud Drive > Cloud Drive in the navigation pane.
    The Cloud Drive page is displayed.
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Suspend and Unsuspend Cloud Sync

You can suspend or unsuspend cloud syncing at any time.

  • To suspend syncing, in the Configuration view, select Cloud Drive > Cloud Drive in the navigation pane, and then click Suspend.
  • To resume syncing, in the Cloud Drive page click Unsuspend.

Refresh the Folder List From the CTERA Portal

You can refresh the folder list from the CTERA Portal by clicking Refresh Folders from Portal in the Cloud Drive page, accessed by selecting the Configuration view, and then selecting Cloud Drive > Cloud Drive.

Control Cloud Sync Upload and Download Speeds

You can limit the cloud sync upload and download speeds using throttling rules to define multiple times and bandwidths for bandwidth throttling.

  1. In the Configuration view, select Cloud Drive > Cloud Drive in the navigation pane.
  2. Click Settings.
    The Cloud Drive Settings window is displayed.
    image.png
    When no throttling rules are defined, there is no speed restriction for uploading or downloading files to the Cloud Drive.
  3. Click Add throttling rule.
  4. Define the following for the throttling rule:
    Out Speed Limit (kb/s) – The maximum speed to use for cloud drive sync upload in Kbits per second. The minimum value for the speed is 8kb/s. If a value is not set, there is no speed limit.
    In Speed Limit (kb/s) – The maximum speed to use for cloud drive sync download in Kbits per second. The minimum value for the speed is 8kb/s. If a value is not set, there is no speed limit.
    Start at – Specify the time when the bandwidth limit used for cloud drive sync throttling starts.
    End at – Specify the time when the bandwidth limit used for cloud drive sync throttling ends. When the end time is before the start time, the end time is the next day.
    Days – Specify that the bandwidth used for cloud drive sync throttling should be restricted every day (the default) or only on specified days.
    Note

    A maximum of 50 rules can be defined.
    When the start and end times for more than one rule overlap, the order of the rules in the list determines how they are implemented with the rule at the top of the list implemented first. Use Move Down and Move Up to change the order the rules are listed.

  5. To remove a rule, select the rule row and click .
    The rule is removed.
  6. Click Save.

Monitor a Caching Gateway

With a Caching Gateway, the following statistics are available:

  • The number of files and amount of storage transferred between the CTERA Edge Filer and the CTERA Portal.
  • The rate of transfer of data over time between the CTERA Edge Filer and the CTERA Portal.
  • The amount of data currently in the cache.
  • The amount of data in the cache over time.
  • The number of currently active clients and the read and write rates between these client and the CTERA Edge Filer.
  • The read and write rates between the clients and the CTERA Edge Filer over time.

To display statistics:

  1. In the** Configuration** view, select Cloud Drive > Cloud Drive in the navigation pane.
  2. Click Show Statistics.
    A new browser window is displayed with the CTERA Portal sign in page.
  3. Login to the CTERA Portal and the statistics are displayed.
    The following shows the statistics for a CTERA Edge Filer.
    image.png

The graphs show the following:
Cloud I/O – Rate of transfer of data over time from the CTERA Edge Filer to the CTERA Portal (Upload) and the CTERA Portal to the CTERA Edge Filer (Download).
Cache History – The amount of data in the cache over time.
Local I/O – The write rate from the client to the CTERA Edge Filer and the read rate from the CTERA Edge Filer to the client, over time.


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