Why is the tar logs tech-support saved with .7z extension in controller?

MVP
MVP
Q:

Why is the tar logs tech-support saved with .7z extension in controller dir(flash)?



A:

Starting from 8.3.0.13, 8.5.0.7 and 8.6.0.3 the controller logs will be saved with extension tar.7z.

Earlier controller logs + tech-support logs  were compressed with basic 'gzip' compression.

 

  • This basic compression was not very effective in terms of compression ratio and resulted into large compressed files.
  • These large files (though compressed) occupied more space on flash storage. Even transferring these files over a slow link branch WAN circuits often timed out.

 

To address the inefficient compression, 7za tool is chosen for archiving various data on the controllers. 7za provides many adjustable parameters that enable faster and better compression.

 

(Aruba-VPNC) [MDC] #tar logs tech-support


This operation may take a while, Please do not power cycle the box

(AAruba-VPNC) [MDC] #dir



-rw-r--r--    1 root     root         4241 Apr 11 00:27 AUDITTRAIL-HISTORY.log

-rw-r--r--    1 root     root        42076 Apr 11 00:27 AUDITTRAIL-LOGIN_OUT-HISTORY.log

-rw-r--r--    1 root     root          152 May 12 01:27 blimits

-rw-r--r--    1 root     root           40 Apr 10 07:20 bmap

-rw-r--r--    1 root     root        11935 Apr 10 07:15 default.cfg

-rw-r--r--    1 root     root        73024 Mar 12 12:11 default.cfg_writemem_2020-03-12_19-11-10

drwxr-xr-x    5 root     root         4096 Apr 10 07:20 fieldCerts

-rw-r--r--    1 root     root        60273 May  8 02:34 flashbackup.tar.gz

-rw-r--r--    1 root     root         1687 Mar  5 10:29 licensedb

-rw-------    1 root     root      4182751 May 12 07:03 logs.tar.7z

-rw-r--r--    2 root     root        13021 Oct 25  2019 original.cfg

drwxr-xr-x    2 root     root         4096 Apr 11 00:31 upgrade-2020-04-11_00-31-27

-rw-r--r--    1 root     root        37454 Oct 29  2019 upgrade_config_backup_8.5.0.0_to_8.4.0.0_2019-10-29-02_36_59.tar.gz
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