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man: IO -> I/O; I/Os -> I/O operations again

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Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13116
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2022-02-17 21:26:43 +01:00
committed by Brian Behlendorf
parent aafb89016b
commit a737b415d6
8 changed files with 29 additions and 26 deletions
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man/man7/zfsconcepts.7
+2 -2
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@@ -193,10 +193,10 @@ Calculating the exact requirement depends heavily
on the type of data stored in the pool.
.Pp
Enabling deduplication on an improperly-designed system can result in
performance issues (slow IO and administrative operations).
performance issues (slow I/O and administrative operations).
It can potentially lead to problems importing a pool due to memory exhaustion.
Deduplication can consume significant processing power (CPU) and memory as well
as generate additional disk IO.
as generate additional disk I/O.
.Pp
Before creating a pool with deduplication enabled, ensure that you have planned
your hardware requirements appropriately and implemented appropriate recovery
man/man7/zfsprops.7
+7 -4
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@@ -1828,7 +1828,8 @@ Although under Linux the
.Xr getxattr 2
and
.Xr setxattr 2
system calls limit the maximum size to 64K.
system calls limit the maximum size to
.Sy 64K .
This is the most compatible
style of extended attribute and is supported by all ZFS implementations.
.Pp
@@ -1836,10 +1837,12 @@ System attribute based xattrs can be enabled by setting the value to
.Sy sa .
The key advantage of this type of xattr is improved performance.
Storing extended attributes as system attributes
significantly decreases the amount of disk IO required.
Up to 64K of data may be stored per-file in the space reserved for system attributes.
significantly decreases the amount of disk I/O required.
Up to
.Sy 64K
of data may be stored per-file in the space reserved for system attributes.
If there is not enough space available for an extended attribute
then it will be automatically written as a directory based xattr.
then it will be automatically written as a directory-based xattr.
System attribute based extended attributes are not accessible
on platforms which do not support the
.Sy xattr Ns = Ns Sy sa