Using proper stripe geometry greatly enhances the performance of an XFS filesystem. This may also be true on some hardware RAIDs that export geometry information to the operating system. If the device exports stripe geometry information, the mkfs utility for ext3, ext4, and xfs will automatically use this geometry. If stripe geometry is not detected by the mkfs utility and even though the storage does, in fact, have stripe geometry, it is possible to manually specify it when creating the file system using the following options:.
The value must be specified in bytes, with an optional k , m , or g suffix. Specifies the number of data disks in a RAID device, or the number of stripe units in the stripe. Hello, friends. In this post, we will explain a trick that can save a lot of work and even an entire system.
XFS is a high-performance bit journaling file system. And so on. Save my name, email, and website in this browser for the next time I comment. All rights reserved. We started this blog to make a difference in Unix Linux blogs world and we promise to Post the best we can and we will invite the best Admins and developers to post their work here.
Sign in. Then, we need a target to open the encrypted volume. I used mybackup as my target, but this target can be named anything:. Since we now can access the encrypted volume, we need to format it before we can store data on it.
You can choose between different filesystem types, like xfs the default on Red Hat Enterprise Linux 8 , ext3, ext4, etc. To write data on the encrypted filesystem, we need to mount it first. Mounting the LUKS encrypted filesystem automatically has security implications. For laptop users, doing this is not a wise choice. If your device gets stolen, so is your data that was stored in the encrypted partition. First, create the appropriate directory to store the key file:.
Previously, we opened the encrypted filesystem and mounted it manually. This adds some overhead to filesystem operations, but its inclusion in a filesystem makes cross-referencing very fast.
It is an essential feature for repairing filesystems online because we can rebuild damaged primary metadata from the secondary copy. However, online filesystem checking and repair is so far the only use case for this feature, so it will remain opt-in at least until online checking graduates to production readiness. From mkfs. The reverse mapping btree maps filesystem blocks to the owner of the filesystem block.
Most of the mappings will be to an inode number and an offset, though there will also be mappings to filesystem metadata. This secondary metadata can be used to validate the primary metadata or to pinpoint exactly which data has been lost when a disk error occurs.
See also [6] and [7] for more information. Starting in Linux 5. Making a new XFS file-system with bigtime enabled allows a timestamp range from December to July rather than December to January For preserving backwards compatibility, the big timestamps feature is not currently enabled by default. The feature will also allow quota timer expirations from January to July rather than January to February Starting from xfsprogs 5. The default values already used are optimised for best performance in the first place.
In most cases, the only thing you need to to consider for mkfs. For mount options, the only thing that will change metadata performance considerably is the logbsize mount option. Increasing logbsize reduces the number of journal IOs for a given workload. The trade off for this increase in metadata performance is that more operations may be "missing" after recovery if the system crashes while actively making modifications.
As of kernel 3. Therefore for optimal performance, in most cases you can just follow Creation. If this filesystem will be on a striped RAID you can gain significant speed improvements by specifying the stripe size to the mkfs.
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