mirror of https://github.com/ceph/ceph
164 lines
4.0 KiB
Groff
164 lines
4.0 KiB
Groff
.TH "CEPH-DENCODER" "8" "February 21, 2012" "dev" "Ceph"
|
|
.SH NAME
|
|
ceph-dencoder \- ceph encoder/decoder utility
|
|
.
|
|
.nr rst2man-indent-level 0
|
|
.
|
|
.de1 rstReportMargin
|
|
\\$1 \\n[an-margin]
|
|
level \\n[rst2man-indent-level]
|
|
level margin: \\n[rst2man-indent\\n[rst2man-indent-level]]
|
|
-
|
|
\\n[rst2man-indent0]
|
|
\\n[rst2man-indent1]
|
|
\\n[rst2man-indent2]
|
|
..
|
|
.de1 INDENT
|
|
.\" .rstReportMargin pre:
|
|
. RS \\$1
|
|
. nr rst2man-indent\\n[rst2man-indent-level] \\n[an-margin]
|
|
. nr rst2man-indent-level +1
|
|
.\" .rstReportMargin post:
|
|
..
|
|
.de UNINDENT
|
|
. RE
|
|
.\" indent \\n[an-margin]
|
|
.\" old: \\n[rst2man-indent\\n[rst2man-indent-level]]
|
|
.nr rst2man-indent-level -1
|
|
.\" new: \\n[rst2man-indent\\n[rst2man-indent-level]]
|
|
.in \\n[rst2man-indent\\n[rst2man-indent-level]]u
|
|
..
|
|
.\" Man page generated from reStructeredText.
|
|
.
|
|
.SH SYNOPSIS
|
|
.nf
|
|
\fBceph\-dencoder\fP [commands...]
|
|
.fi
|
|
.sp
|
|
.SH DESCRIPTION
|
|
.sp
|
|
\fBceph\-dencoder\fP is a utility to encode, decode, and dump ceph data
|
|
structures. It is used for debugging and for testing inter\-version
|
|
compatibility.
|
|
.sp
|
|
\fBceph\-dencoder\fP takes a simple list of commands and performs them
|
|
in order.
|
|
.SH COMMANDS
|
|
.INDENT 0.0
|
|
.TP
|
|
.B version
|
|
Print the version string for the \fBceph\-dencoder\fP binary.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B import <file>
|
|
Read a binary blob of encoded data from the given file. It will be
|
|
placed in an in\-memory buffer.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B export <file>
|
|
Write the contents of the current in\-memory buffer to the given
|
|
file.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B list_types
|
|
List the data types known to this build of \fBceph\-dencoder\fP.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B type <name>
|
|
Select the given type for future \fBencode\fP or \fBdecode\fP operations.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B decode
|
|
Decode the contents of the in\-memory buffer into an instance of the
|
|
previously selected type. If there is an error, report it.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B encode
|
|
Encode the contents of the in\-memory instance of the previously
|
|
selected type to the in\-memory buffer.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B dump_json
|
|
Print a JSON\-formatted description of the in\-memory object.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B count_tests
|
|
Print the number of built\-in test instances of the previosly
|
|
selected type that \fBceph\-dencoder\fP is able to generate.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B select_test <n>
|
|
Select the given build\-in test instance as a the in\-memory instance
|
|
of the type.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B get_features
|
|
Print the decimal value of the feature set supported by this version
|
|
of \fBceph\-dencoder\fP. Each bit represents a feature. These correspond to
|
|
CEPH_FEATURE_* defines in src/include/ceph_features.h.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B set_features <f>
|
|
Set the feature bits provided to \fBencode\fP to \fIf\fP. This allows
|
|
you to encode objects such that they can be understood by old
|
|
versions of the software (for those types that support it).
|
|
.UNINDENT
|
|
.SH EXAMPLE
|
|
.sp
|
|
Say you want to examine an attribute on an object stored by \fBceph\-osd\fP. You can do:
|
|
.sp
|
|
.nf
|
|
.ft C
|
|
$ cd /mnt/osd.12/current/2.b_head
|
|
$ attr \-l foo_bar_head_EFE6384B
|
|
Attribute "ceph.snapset" has a 31 byte value for foo_bar_head_EFE6384B
|
|
Attribute "ceph._" has a 195 byte value for foo_bar_head_EFE6384B
|
|
$ attr foo_bar_head_EFE6384B \-g ceph._ \-q > /tmp/a
|
|
$ ceph\-dencoder type object_info_t import /tmp/a decode dump_json
|
|
{ "oid": { "oid": "foo",
|
|
"key": "bar",
|
|
"snapid": \-2,
|
|
"hash": 4024842315,
|
|
"max": 0},
|
|
"locator": { "pool": 2,
|
|
"preferred": \-1,
|
|
"key": "bar"},
|
|
"category": "",
|
|
"version": "9\(aq1",
|
|
"prior_version": "0\(aq0",
|
|
"last_reqid": "client.4116.0:1",
|
|
"size": 1681,
|
|
"mtime": "2012\-02\-21 08:58:23.666639",
|
|
"lost": 0,
|
|
"wrlock_by": "unknown.0.0:0",
|
|
"snaps": [],
|
|
"truncate_seq": 0,
|
|
"truncate_size": 0,
|
|
"watchers": {}}
|
|
.ft P
|
|
.fi
|
|
.SH AVAILABILITY
|
|
.sp
|
|
\fBceph\-dencoder\fP is part of the Ceph distributed file system. Please
|
|
refer to the Ceph wiki at \fI\%http://ceph.newdream.net/wiki\fP for more
|
|
information.
|
|
.SH SEE ALSO
|
|
.sp
|
|
\fBceph\fP(8)
|
|
.SH COPYRIGHT
|
|
2011, New Dream Network
|
|
.\" Generated by docutils manpage writer.
|
|
.\"
|
|
.
|