[CentOS] Filesystem choice for BackupPC extrenal drive

Fri Feb 5 04:32:24 UTC 2021
Strahil Nikolov <hunter86_bg at yahoo.com>

XFS is suitable for parallel workload, so I would pick ext4 for this case.
Here is a quote from https://access.redhat.com/articles/3129891 :
Another way to characterize this is that the Ext4 file system variants tend to perform better on systems that have limited I/O capability. Ext3 and Ext4 perform better on limited bandwidth (< 200MB/s) and up to ~1,000 IOPS capability. For anything with higher capability, XFS tends to be faster. 

Best Regards,Strahil Nikolov

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  On Fri, Feb 5, 2021 at 2:42, Kenneth Porter<shiva at sewingwitch.com> wrote:   I'm setting up a CentOS 7 box as a BackupPC 4 server to back up Windows 
boxes on my LAN. I'm using an external 1.5 TB USB drive for the "pool". 
BackupPC deduplicates by saving all files in a pool, a directory hiearchy 
with each file named for the checksum of the file, and the directories 
acting as a hash tree to reach each pool file. A backup for a specific 
workstation is a directory tree of checksums and metadata that point into 
the pool for the actual file data. Incremental backups are reverse deltas 
from periodic "filled" backups of all files. I'm using rsyncd to pull 
changed files from the workstations.

I'm deciding which filesystem to use for my external drive. I'm thinking 
the main candidates are ext4 and xfs. What's the best filesystem for this 


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