06-13-2017
You know about NFS, samba, and other tools, right? These allow you to mount a file system from server A onto server B. You want to create a fileserver machine.
fileserver - houses huge files on large fast disk farms
server A writes to fileserver's filesystem
server B, C ,D ,E, ....Z mount fileserver's filesystem readonly and run the extracts and insert data into a db.
In other words do not spend time and network resources copying files, simply mount filesystems over the network on boxes where they need to be read or written.
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LEARN ABOUT MOJAVE
quotacheck
QUOTACHECK(8) BSD System Manager's Manual QUOTACHECK(8)
NAME
quotacheck -- filesystem quota consistency checker
SYNOPSIS
quotacheck [-g] [-u] [-v] filesystem ...
quotacheck [-g] [-u] [-v] -a
DESCRIPTION
Quotacheck examines each filesystem, builds a table of current disk usage, and compares this table against that recorded in the disk quota
file for the filesystem. If any inconsistencies are detected, both the quota file and the current system copy of the incorrect quotas are
updated (the latter only occurs if an active filesystem is checked). By default both user and group quotas are checked.
Available options:
-a If the -a flag is supplied in place of any filesystem names, quotacheck will check all the read-write filesystems with an existing
mount option file at its root. The mount option file specifies the types of quotas that are to be checked.
-g Only group quotas are checked. The mount option file, .quota.ops.group, must exist at the root of the filesystem.
-u Only user quotas are checked. The mount option file, .quota.ops.user, must exist at the root of the filesystem.
-v quotacheck reports discrepancies between the calculated and recorded disk quotas.
Specifying both -g and -u is equivalent to the default. Parallel passes are run on the filesystems required, in an identical fashion to
fsck(8).
Normally quotacheck operates silently.
Quotacheck expects each filesystem being checked to have quota data files named .quota.user and/or .quota.group located at the filesystem
root. If a binary data file is not present, quotacheck will create it. The default filename and root location cannot be overridden.
Quotacheck is normally run at fsck time.
Quotacheck accesses the raw device in calculating the actual disk usage for each user. Thus, the filesystems checked should be quiescent
while quotacheck is running.
FILES
Each of the following quota files is located at the root of the mounted filesystem. The mount option files are empty files whose existence
indicates that quotas are to be enabled for that filesystem. The binary data files will be created by quotacheck, if they don't already
exist.
.quota.user data file containing user quotas
.quota.group data file containing group quotas
.quota.ops.user mount option file used to enable user quotas
.quota.ops.group mount option file used to enable group quotas
SEE ALSO
quota(1), quotactl(2), edquota(8), fsck(8), quotaon(8), repquota(8)
HISTORY
The quotacheck command appeared in 4.2BSD.
4.2 Berkeley Distribution October 17, 2002 4.2 Berkeley Distribution