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FSCKPTADM (1M)
Maintenance Commands

Table of contents

NAME

fsckptadm - VxFS Storage Checkpoint administration utility

AVAILABILITY

VRTSvxfs

SYNOPSIS

fsckptadm [-aCeh] blockinfo pathname ckpt_name mount_point

fsckptadm [-v] clear { nomount | remove } ckpt_name mount_point

fsckptadm [-nruv] create ckpt_name [-S signature] [-D data_policy] [-M metadata_policy] mount_point

fsckptadm [-nruv] createall ckpt_name [-S signature] [-D data_policy] [-M metadata_policy] mount_point...

fsckptadm getquotalimit mount_point

fsckptadm [-cv] info ckpt_name mount_point

fsckptadm [-clv] list mount_point...

fsckptadm [-cv] pathinfo pathname

fsckptadm [-v] { quotaon | quotaoff } mount_point

fsckptadm [-sv] remove ckpt_name mount_point

fsckptadm [-v] rename old_ckpt_name new_ckpt_name mount_point

fsckptadm [-sv] set { nodata | nomount | remove } ckpt_name mount_point

fsckptadm [-fm] setquotalimit mount_point hard_limit soft_limit

DESCRIPTION

The fsckptadm utility performs administrative tasks, such as creation, deletion, and conversion, on a Storage Checkpoint of a specified VERITAS File System. ckpt_name specifies the name of a Storage Checkpoint. The maximum length of a Storage Checkpoint name is 127 characters. Storage Checkpoint names cannot contain a colon (:). mount_point specifies the directory on which the file system or Storage Checkpoint is mounted.

fsckptadm also sets and displays quota limits on Storage Checkpoints. You must be a privileged user to set Storage Checkpoint quotas and turn quotas on and off.

Cluster File System Issues

If any file system specified with the createall keyword is a cluster file system, then all of the specified file systems must be disk layout Version 6 or later.

KEYWORDS

blockinfo
Displays information about the file pathname under the Storage Checkpoint ckpt_name at the specified mount point. Information includes the offset and size of each changed block, extented block, or data hole in the file. Used in conjunction with the -a, -C, -e, or -h options. -a displays all the information. Default is -a.
clear
Clears the attributes of a Storage Checkpoint.
create
Creates a Storage Checkpoint on a single file system.
createall
Creates a Storage Checkpoint on multiple file systems.
getquotalimit
Displays current quota limits, current usage, and any flags set with setquotalimit keyword.
info
Displays information about a Storage Checkpoint, such as its creation time, flags (nodata, nomount, or remove), signature, and other attributes.
list
Lists all the Storage Checkpoints of a file system.
pathinfo
Displays the name of the Storage Checkpoint containing the file at pathname. Displays "UNNAMED" if the Storage Checkpoint has no name. Also displays the signature specified by the -S option.
quotaoff
Turns off Storage Checkpoint quotas.
quotaon
Turns on Storage Checkpoint quotas.
remove
Removes a Storage Checkpoint from a file system.
rename
Renames a Storage Checkpoint of a file system. You can rename both the primary fileset and its Storage Checkpoints.
set
Sets the attributes of a Storage Checkpoint.
setquotalimit
Sets the hard limit and soft limit for Storage Checkpoint quotas. Limits are set in terms of file system blocks. If the specified value is zero, the maximum number of file system blocks is the limit.

OPTIONS

-a blockinfo
Displays offset and size of each changed block, extented block, or data hole in a file under the Storage Checkpoint at the specified mount point.
-c
Resets statistic counters such as number of reads, writes, and pushes. Used with the info, list, and pathinfo keywords.
-C blockinfo
Displays offset and size of each changed block in the file under the Storage Checkpoint at the specified mount point.
-D data_policy
Specifies an allocation policy to be used for file data in the newly created Storage Checkpoint. Used with the create and createall keywords. See the fsapadm(1M) manual page for information on allocation policies.
-e blockinfo
Displays offset and size of each changed extent of a grown file under the Storage Checkpoint at the specified mount point.
-f setquotalimit
If a hard limit is exceeded, all further allocations on any of the Storage Checkpoints fail, but existing Storage Checkpoints are preserved. Without the -f option, one or many removable Storage Checkpoints are deleted to make space for the operation to succeed.
-h blockinfo
Displays offset and size of the data holes in the file under the Storage Checkpoint at the specified mount point.
-l
Displays statistical information on the file system's primary fileset as well as its Storage Checkpoints. Used only with the list keyword.
-m setquotalimit
If a soft limit is exceeded, no new Storage Checkpoints can be created. Usage must return below the soft limit before more Storage Checkpoints can be created.
-M metadata_policy
Specifies an allocation policy to be used for metadata in the newly created Storage Checkpoint. Used with the create and createall keywords. See the fsapadm(1M) manual page for information on allocation policies.
-n
Sets the nodata attribute, creating a Storage Checkpoint that contains no file data. Used with the create and createall keywords.
-r
Sets the remove attribute on a Storage Checkpoint at creation time. This allows the system to remove the Storage Checkpoint under certain ENOSPC conditions. Used with the create and createall keywords.
-s
Performs the operation synchronously, that is, the command does not return until the operation completes. Used with the remove and set keywords.
-S signature
An identifying signature of 128 or less alphanumeric characters stored in the newly created Storage Checkpoint. Used with the create and createall keywords. The signature is displayed by the info and pathinfo keywords.
-u
Sets the nomount attribute of a Storage Checkpoint when it is created so that it cannot be mounted. Used with the create and createall keywords.
-v
Verbose mode. Displays extensive statistical information.

ARGUMENTS

nodata
A nodata Storage Checkpoint is one that does not contain actual file data. Instead, it contains a collection of markers of all the changed blocks maintained for each file. A nodata Storage Checkpoint can only be created if its downstream Storage Checkpoint (that is, the next older Storage Checkpoint) is also a nodata Storage Checkpoint.
nomount
Specifies a Storage Checkpoint that cannot be mounted. If the Storage Checkpoint is already mounted, the attribute is still set, and the next attempt to mount the Storage Checkpoint will fail.
remove
Specifies a removable Storage Checkpoint. Under some conditions, when the file system runs out of space, removable Storage Checkpoints are deleted. This ensures that applications can continue running without interruptions due to lack of disk space. Non-removable Storage Checkpoints are not automatically removed under certain ENOSPC conditions. It is a good policy to create only removable Storage Checkpoints. See the VERITAS File System Administrator's Guide for more information.

EXAMPLES

The following command creates a nodata Storage Checkpoint named friday_7pm, of the file system \mnt0: 


# fsckptadm -n create friday_7pm /mnt0

To list the Storage Checkpoint of the file system \mnt0, enter: 



# fsckptadm list /mnt0
/mnt0
friday_7pm:
        ctime      =  Fri Jun  1 19:02:27 2001
        mtime      =  Fri Jun  1 19:02:27 2001
        flags      =  nodata

The following command removes the Storage Checkpoint named monday_7pm asynchronously. 



# fsckptadm remove monday_7pm /mnt0
fsckptadm list /mnt0
/mnt0

The following command deletes the Storage Checkpoint named tuesday_7pm synchronously. 



# fsckptadm -s remove tuesday_7pm /mnt0
fsckptadm list /mnt0
/mnt0

The following command creates a Storage Checkpoint on multiple file systems. 



# fsckptadm -r createall tuesday_7pm /mnt0 /mnt1 /mnt2

The following example shows the use of the pathinfo keyword. 



# fsckptadm pathinfo /test1
UNNAMED

# fsckptadm pathinfo /test1/file
UNNAMED

# fsckptadm create checkpoint1 /test1
# mount -V vxfs -o=checkpoint1 /dev/vx/dsk/test1:checkpoint1 /test2
# fsckptadm pathinfo /test2
checkpoint1

# fsckptadm pathinfo /test2/file
checkpoint1

# fsckptadm -v pathinfo /test2/file
/test2/file
checkpoint1:
        ctime                =  Tue Jun 12 16:11:48 2001
        mtime                =  Tue Jun 12 16:11:48 2001
        flags                =  mounted
        .
        .
        .

# fsckptadm -v info checkpoint1 /test1
checkpoint1:
        ctime                =  Tue Jun 12 16:11:48 2001
        mtime                =  Tue Jun 12 16:11:48 2001
        flags                =  mounted
        .
        .


        .
Following examples show various blockinfo operations for the file file1: 


# fsckptadm -C blockinfo /mnt2/d1/d2/file1 cl1 /mnt2
/mnt2/d1/d2/file1:  <offset, len, flag>
                    <0k, 8k, CHANGED>
                    <8k, 8k, CHANGED>
                    <200k, 8k, CHANGED>

# fsckptadm -e blockinfo /mnt2/d1/d2/file1 cl1 /mnt2
/mnt2/d1/d2/file1:  <offset, len, flag>
                    <4096k, 1024k, EXTENDED>
                    <5120k, 1k, EXTENDED>

# fsckptadm -h blockinfo /mnt2/d1/d2/file1 cl1 /mnt2
/mnt2/d1/d2/file1:  <offset, len, flag>
                    <4096k, 1024k, HOLE>

/mnt2/d1/d2/file1:  <offset, len, flag>
                    <0k, 8k, CHANGED>
                    <8k, 8k, CHANGED>
                    <16k, 48k, >
                    <64k, 136k, >
                    <200k, 8k, CHANGED>
                    <208k, 3888k, >
                    <4096k, 1024k, HOLE | EXTENDED>
                    <5120k, 1k, EXTENDED>

The following example sets a Storage Checkpoint quota with a 1024 block hard limit and 512 block soft limit: 



# fsckptadm setquotalimit /mnt1 1024 512

The following example obtains current Storage Checkpoint usage and limits: 



# fsckptadm getquotalimit /mnt1
Filesystem  hard limit  soft limit  usage  action_flag
/mnt         1024         512        29

The following example turns Storage Checkpoint quotas on: 



# fsckptadm quotaon /mnt1

The following example turns Storage Checkpoint quotas off: 



# fsckptadm quotaoff /mnt1

SEE ALSO

fsadm_vxfs(1M), fsapadm(1M), fsckpt_restore(1M), mount_vxfs(1M)

VERITAS File System Administrator's Guide

Last updated: 01 April 2006
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