The ext4 or fourth extended filesystem is a journaling file system for linux/*nix developed as the successor to ext3.

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Ext4 Sub directory scalability

According to http://ext4.wiki.kernel.org/index.php/Ext4%5FHowto says: Right now the maximum possible number of sub directories contained in a single directory in Ext3 is 32000. Ext4 breaks that ...
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Why should I switch to ext4 when upgrading to Ubuntu 9.10?

I'm going to upgrade from Ubuntu 9.04 to Ubuntu 9.10 in a near future and wanted to know if I should migrate my existing ext3 partitions to ext4 during the process and, if yes, why?
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Best filesystem for storing photos on Linux

I have 200+G of photos I usually keep on my main computer so that they are always available. File sizes range from 2-3MB JPGs to 10-12MB RAW files. I thought the nice old ext3 could be abandoned in ...
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How to diagnose erratic disk behavior?

I have a web site with users lighttpd and CGI scripts. After upgrading to Fedora 11 (ext4) the disc access became erratic. The timing of python -c 'import cgi' varies between 0.1 to almost 10 ...
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Filesystem for an external drive that'll only connect to Linux

I just bought a new 500GB external harddrive. Most of the time I only store operating system ISO's on those things and some movies. Large files anyway, well over 4GiB sometimes, so FAT is out of the ...
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Slow ext4 fsck

Why fsck is so slow on ext4 filesystem? I was always using reiserfs or xfs and with those systems fsck was really fast, just few seconds. Now i decided to give a try ext4 but i'm dissapointed that ...
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What are the differences between ext3, ext4 , ReiserFS?

And why should I pick one instead of the other?
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Is the F.U.D. about ext4 justified? Or would it be safe to use in some production systems?

I am wondering if ext4 is safe to use on my servers. But I've heard so much FUD about it that I am concerned. Our system could lose some data, and it would not be too big a deal. Even a full days ...