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Full Discussion: ZFS Filesystem
Operating Systems Solaris ZFS Filesystem Post 302953026 by jlliagre on Tuesday 25th of August 2015 02:40:18 AM
Old 08-25-2015
Quote:
Originally Posted by os2mac
while admittedly I don't know the specifics of how it works I do know that a zfs snapshot is a delta value of the FS.
This is incorrect, a snapshot is a frozen dataset content. What you call the delta value is written once on the live file system.
Quote:
so it must be recording those deltas somewhere.
The snapshots delta is already there, no need to record it.
Quote:
The older the snap the larger the file
Yes, if the file system is evolving.
Quote:
and the more snaps the more writes.
No, there is no write inflation.
Quote:
I can only tell you from practical experience that removing snapshots DOES improve performance.
Perhaps had you rolling snapshots in place?
 

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LEARN ABOUT FREEBSD

lessecho

LESSECHO(1)						      General Commands Manual						       LESSECHO(1)

NAME

       lessecho - expand metacharacters

SYNOPSIS

       lessecho [-ox] [-cx] [-pn] [-dn] [-mx] [-nn] [-ex] [-a] file ...

DESCRIPTION

       lessecho  is  a program that simply echos its arguments on standard output.  But any metacharacter in the output is preceded by an "escape"
       character, which by default is a backslash.

OPTIONS

       A summary of options is included below.

       -ex    Specifies "x", rather than backslash, to be the escape char for metachars.  If x is "-", no escape char is used and  arguments  con-
	      taining metachars are surrounded by quotes instead.

       -ox    Specifies "x", rather than double-quote, to be the open quote character, which is used if the -e- option is specified.

       -cx    Specifies "x" to be the close quote character.

       -pn    Specifies "n" to be the open quote character, as an integer.

       -dn    Specifies "n" to be the close quote character, as an integer.

       -mx    Specifies "x" to be a metachar.  By default, no characters are considered metachars.

       -nn    Specifies "n" to be a metachar, as an integer.

       -fn    Specifies "n" to be the escape char for metachars, as an integer.

       -a     Specifies that all arguments are to be quoted.  The default is that only arguments containing metacharacters are quoted

SEE ALSO

       less(1)

AUTHOR

       This manual page was written by Thomas Schoepf <schoepf@debian.org>, for the Debian GNU/Linux system (but may be used by others).

       Send bug reports or comments to bug-less@gnu.org.

							     Version 458: 04 Apr 2013						       LESSECHO(1)
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