NetVault
NetVault is used to backup data. The SNAZ system has been updated from NetVault 7.4 to latest NetVault 7.4.3. thus supports backup and restore ACL and Extended Attributes.I am verifing this new function these days.
First, in SNAZ operating system, start up backup service. Create a large volume as virtual harddisk for backup and restore. and then create other shares and files with assigning ACL and EAs. Second step, install NetVault GUI management software in Windows platform(or Linux), configure the SNAZ as NetVault server: Addministrator-Domain, select SNAZ; Device-Management-Server-Selection, select SNAZ, Add-Add Standalone Driver, and create virtual disk(right click) on precious large volume(Driver location-/exports/large_volume). Now, could run Backup and Restore.
Extended file attributes:
Permission, records of creation and modification times, author of a document, character encoding of a plain-text document, or a checksum. There are four name spaces: user,trusted,security and system.
Attr:(Add, remove and print)
set or add extended attribute to file/folder:
# attr -s attrname -V attr_value pathname(file/folder name)
print/show extended attribute of file/folder:
# attr -g attrname pathname(file/folder name)
remove identified attribute:
# attr -r attrname pathname(file/folder name)
getfattr -d: print file/folder’s EA entries.
According to NetVault supporting max 64KB EAs, how to create a pure 64K test file?
#!/bin/bash
# create 64KB EA file
for ((i=0;i<=524288;i++))
do
printf "i";
done
This script will create a 64KB test file, with 524288 "i" characters. But when I tried to used this output file in the following commands:
# attr -s Club -V `cat 64KB_file_name` /exports/barcelona
There will be an error messages: argument list too long. I had to assign EA one by one:
# !/bin/bash
# assign EA one by one
for ((i=0;i<=524388;i++))
do
attr -s Team_$i -V i /exports/barcelona
done
It would be added successful, but issue "getfattr -d /export/barcelona" still meet "Argument list too long" errors. I'll fixed this issue tomorrow.