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Akeeba Backup for Joomla!

#16025 Site Extraction problems

Posted in ‘Akeeba Backup for Joomla! 4 & 5’
This is a public ticket

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Environment Information

Joomla! version
n/a
PHP version
n/a
Akeeba Backup version
n/a

Latest post by nicholas on Friday, 10 May 2013 14:22 CDT

user1997
Mandatory information about my setup:

Have I read the related troubleshooter articles above before posting (which pages?)? No
Have I searched the tickets before posting? No
Have I read the documentation before posting (which pages?)? No
Joomla! version: 2.5.11
PHP version: 5.3
MySQL version: 5.5.23
Host: HostGator
Akeeba Backup version: 3.2.7 (2011-04-17)

Description of my issue:

I have on going problem extracting large sites. When the site is less than 2Gb Backup/Restore works fine. I have on site backup which is around 5Gb and when I extract the backup locally only few folders get extracted. No errors nothing. I use Extract Wizard 3.3

This doesn't happen only to one site but few other. I tried everything possible but can't figure out what is wrong. When making a backup I see no errors.

I attached a backup log, however you might need to look for particular website as I keep all backup files from different sites in one folder. The problematic site is www.younglivingconnection.com

I hope this is enough information. The backup file is about 5Gb so if you need to download it I can make it available somewhere.

Arthur Klisiewicz

nicholas
Akeeba Staff
Manager
You must never create a single part backup archive with a size over 2Gb. PHP can't handle integers over 2Gb minus 1 byte and it corrupts the backup archive. The only exception is when using the LInux 64-bit version of PHP; it's the only case where PHP internally uses 64-bit signed integers and supports files several petabytes long. In most cases this isn't what you have so you have to instead use a part size for split archives around 2000Mb. This is the default behaviour when you use the Configuration Wizard in Akeeba Backup.

Go to Configuration, find the Archiver Engine row and click on Configure. In the part size for split archives option which appears below select the Custom setting and enter 2000 in the box. Then take a new backup.

Nicholas K. Dionysopoulos

Lead Developer and Director

🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!

user1997
This problem happens with files which are 2Gb or less in size as well. The only case when Restoration works is when I disable all extra (non Joomla folders) and the size is around 200-300Mb. By extra folders I mean folders where I keep additional files (downloads, mp3, images, pdf and zip files). When I exclude those folders the backup seem to be smaller and then restore works. Unfortunately most of my sites are more than 2-3Gb in size and some are 6-10Gb. This same problem happens with multiple sites. I tried to limit the JPA size to even 1Gb and it did not help, so there must be some other reason for the problem.

Ath the moment I have an urgent situation, because on of installed extenstions completely crashed my site. It is down and I have several hundred registered users, can't afford for this site to be down fo long time. Unfortunately I cannot extract it.

One other suggestion. When running a backup configuration wizard I just let the wizard to configure all the settings, then I run a backup right after. This is how the 5Gb file was created, so if we should not use files larger than 2Gb the wizard should not allow to use unlimited size. The HostGator where I keep my site isa Linux based server and I run PHP5.3 so from what you saying even the large files should be handled fine. I suspect it is rather the Extraction Wizard problem and perhaps the backup set is fine.

I think I've seen some info on emergency extraction/restoration on your site but cannot find it. Can you tell me if I can use it in this case and where to look for instructions if so?

Regards - Arthur

nicholas
Akeeba Staff
Manager
I know of a site that backed up to slightly over 60Gb and its restoration is working, so I don't think that the size is relevant. What could be relevant is backing up files with an ever changing size, such as log files. But I don't think that's the case either.

First make sure that you are downloading the backup archive using FTP in binary transfer mode. Also double check the file size of the backup. It should match the one on the server.

There are two methods for extracting a backup archive, Akeeba eXtract Wizard and Akeeba Kickstart. The latter needs a web server. You can have a local web server, e.g. XAMPP, to run it. I would suggest trying that as well.

Nicholas K. Dionysopoulos

Lead Developer and Director

🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!

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