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EXT4 On Linux 4.13 Can Now Support Around 2 Billion Directory Entries

Written by Michael Larabel in Linux Storage on 9 July 2017 at 07:10 AM EDT. 16 Comments

EXT4 on Linux 4.13 is supporting its new "large directory" feature.

The EXT4 "largedir" feature overcomes the current limit of around ten million entires allowed within a directory on EXT4. Now, EXT4 directories can support around two billion directory entries. However, you are likely to hit performance bottlenecks before hitting this new EXT4 limitation.

EXT4 in Linux 4.13 also has xattr-in-inode support, parallell discards, xattr deduplication, and support for extended attribute values up to 64k.

The complete list of EXT4 changes for Linux 4.13 via this pull request.

Ted Ts'o also sent in the fscrypt updates overnight and it includes the AES-128-CBC support.

16 Comments

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About The Author

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.