cat /proc/sys/fs/file-max
589420
The output tells us it is set to 589420.
The vendor asked for this to be increased to 1639200. We can add change the value immediately by executing:
# sysctl -w fs.file-max=1639200
To make this a permanent setting applied everytime the system reboots an edit of /etc/sysctl.conf file is required. Add:
fs.file-max = 1639200
Save the changes to the file and execute sysctl -p, this will put the changes into effect.
# sysctl -p
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 0
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
fs.file-max = 1639200
Thats all there is to it!
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mkdir tcserver yum search vfabric [root@cluster1 vfabric-web-server]# yum search vfabric Name and summary matches only, use “search all” for everything. yum install vfabric-tc-server-standard.noarch vfabric-web-server.x86_64 vfabric-web-server-debuginfo.x86_64 vfabric-web-server-devel.x86_64 cd /opt/vmware/ [root@cluster1 vmware]# ls cd vfabric-tc-server-standard/ Lets create a webserver instance [root@cluster1 vfabric-web-server]# ./newserver –rootdir=/opt/vmware/vfabric-web-server –server=rmohan.com –serverdir=/usr/webserver/rmohan –mpm=worker –httpdver=2.2.23.2-64 Created vfhttpd system user account Size of SSL RSA key, in bits [2048]? Created /usr/webserver/rmohan/ssl/rmohan.com.key Choose a passphrase to encrypt the .pem backup copy of this key Fill in information for this certificate. You are about to be asked to enter information that will be incorporated Please enter the following ‘extra’ attributes SSL files generated as /usr/webserver/rmohan/ssl/rmohan.com.* New server instance created in Modify /usr/webserver/rmohan/conf/httpd.conf [root@cluster1 vfabric-web-server]#
#!/bin/sh logmsg () { while read instance #!/bin/ksh BASENAME=`basename $0` WAZZZ_HOME=/usr/WebSphere/AppServer die_usage() [[ $# -eq 3 ]] || die_usage 111 JVVVM_NAME=$1 JVVVM_LOG_DIR=$WAZZZ_HOME/profiles/node01/logs/$JVVVM_NAME $JVVVM_BIN_DIR/serverStatus.sh -all | grep ” $JVVVM_NAME” | grep -v grep | grep -v $BASENAME > /dev/null 2>&1 if [[ $? -ne 0 ]] if [[ -e $JVVVM_LOG_DIR/${JVVVM_NAME}.pid ]] # Lets get the PID from the JVVVM’s pid file if [[ $PS_PID -eq $FILE_PID ]] echo “INFO: $BASENAME: Stopping the $JVVVM_NAME JVM with process id: $JVVVM_PID” echo “INFO: $BASENAME: Attempting graceful stop of $JVVVM_NAME…” # if [[ $IS_RUNNING -eq 0 ]] echo “INFO: $BASENAME: $JVVVM_NAME has been stopped.” exit 0 How to check the exit status codeWhen a command finishes execution, it returns an exit code. The exit code is not displayed on the screen by default. To examine the exit code, you need to examine a special variable, “$?” Say, you are searching for a string in a text file. $ grep x1y2z3 somefile.txt $ The standard output of the command returns null, which is a pretty good indication that the string cannot be found in the file. But what if you embed the grep command in a script? How can you tell if the string is found or not? Checking the exit code will tell you. Let’s first try it out interactively. $ grep x1y2z3 somefile.txt $ echo $? 1 Note that in bash, the exit status is 0 if the command succeeded, and 1 if failed. For grep, 0 means that the string was found, and 1 (or higher), otherwise. To check the exit status in a script, you may use the following pattern: somecommand argument1 argument2 RETVAL=$? [ $RETVAL -eq 0 ] && echo Success [ $RETVAL -ne 0 ] && echo Failure Bash Script check if folder exists
This piece of snippet code below will check if a folder exists.
Linux OS that has NTFS driver installed, can easily to plug in and plug out NTFS formatted external drives. Or look for ntfs-3g driver if NTFS is not supported. And can easily be used by both Windows OS and Linux OS. This piece of snippet code below will check if a folder exists and execute a command if a folder is found. In Linux world, depends on the distro you are using. If you insert an NTFS formatted external drive you need to mount the drive. Once the external drive is inserted type: df -h Then you will have this output or it might be different in your distro. /dev/sdb1 1.9T Then you can proceed to mount the drive like: mount -t ntfs /dev/sdb1 /media/Week1 (Week1 is the folder name, can be change to any name) Of course there are other methods, if the command above will not work. Type “man mount” (don’t include quotes when typing on the terminal) if you want to dig further about mount command. For example if you have four drives for Week1 to Week4 rotational backup (monthly backup one drive for each week). For readability and clarity purposes, its better to have one folder specific for each week. So in /media or whichever folder you mount the external drives. There will be Week1, Week2, Week3 or Week4 folders. Of course backup can be done manually, but it will be awesome and if it could be done automatically. Bash script and crontab will come to the rescue. For Bash script to check which folder to use, this piece of snippet code below. If there are four folders on /media and each external drive is mounted to an specific folder. Once the drive is inserted, Linux OS will automatically activate the mount drive and the mounted folder. Here’s the piece of snippet code below: ====================== #!/bin/sh ====================== And you can configure crontab to run the script at a specified date and time. Type crontab -e and configure the settings as desired. How can I determine my user account’s OU in a Windows domain? set objSysInfo = CreateObject(“ADSystemInfo”) set objUser = GetObject(“LDAP://” & objSysInfo.UserName) wscript.echo “DN: ” & objUser.distinguishedName gpresult /r gpresult -v|more I think i found the answer; even though chkconfig reported that
"rpcbind" was setup to start in run level 3, for some reason it was
not running.
After this was started; I was able to mount the NFS share.
# who -r
run-level 3 2012-02-16 19:19
# chkconfig --list rpcbind
rpcbind 0:off 1:off 2:on 3:on 4:on 5:on 6:off
# service rpcbind status
rpcbind is stopped
# service rpcbind start
Starting rpcbind: [ OK ]
Thanks,
On 2/17/12, unix syzadmin <unixsyzadmin gmail com> wrote:
> Hi,
>
> I am getting the following error on RHEL6 for NFS mount. Please suggest.
>
> # more /etc/redhat-release
> Red Hat Enterprise Linux Server release 6.1 (Santiago)
>
> # uname -r
> 2.6.32-131.0.15.el6.x86_64
>
> # mount -t nfs nfs02:/share0217 /mnt
> mount.nfs: rpc.statd is not running but is required for remote locking.
> mount.nfs: Either use '-o nolock' to keep locks local, or start statd.
> mount.nfs: an incorrect mount option was specified
>
> Thanks.
>
Resilient File System will likely replace NTFS completely within the next versions of Windows, and here are some reasons why you are going to really love the new file system. Comparing ReFS and NTFS FeaturesAlthough ReFS is a different file system, there are similar features between ReFS and NTFS. The easiest way to compare those is to look at the feature list side by side. Consider the following feature sets:
Note also that ReFS only uses a 64KB cluster size, which means a lot of wasted space for disks with lots of small files. Since ReFS uses a Copy on Write mechanism, there’s a greater chance of fragmentation.
Notice that key capabilities missing from ReFS as compared to NTFS are EFS encryption, quotas, and compression. BitLocker may be used for encrypting these volumes while EFS is not an option. Thus, when using ReFS, encryption doesn’t need to be part of the file system. BitLocker satisfies the need for encrypting data on the volume as it encrypts the contents of the entire disk. Quotas may be managed outside the file system rather than through the file system like NTFS. Not supporting Hard Links is a key reason why you wouldn’t use ReFS for a system disk; files in the system32 folder are really hard linked back into the WinSxS folder structure. You might think that ReFS would have data deduplication built-into the file system. The fact that it doesn’t may not prohibit other components or third-party solutions from interfacing with ReFS through the API set provided. Command Line Directives for ReFS For those that are script fanatics (you know who you are), I’ve written this section just for you. We all know that the need for scripting language happens all the time. Perhaps you’re just creating re-creatable virtual environments for one reason or another…and now you need to include the creation of some ReFS volumes. Below are some valuable commands including conventional and PowerShell examples. Formatting a ReFS Volume While this can be done from the UI quite easily by choosing ReFS as the file system in the drop down from the Format dialog, this is also easily done from the command line. Full format example below: Command-Line Format /fs:ReFS J: PowerShell Equivalent Format-Volume –DriveLetter J –FileSystem ReFS -Full In fact, typical command line syntax and optional parameters apply. Therefore, if you want this to be a quick format, just append /q to the above command line. However, you have the option to enable Integrity Streams for the volume. Note the following command: Command-Line Format /fs:ReFS /q /i:enable J: PowerShell Equivalent Format-Volume –DriveLetter J –FileSystem ReFS –SetIntegrityStreams $true The preceding command enables Integrity Streams on drive J: and performs a quick format. The /i option offers you the ability to enable|disable this feature for the volume. If you enable this option, all files created on the volume will be configured with integrity. You may turn this off for individual files or folders using the Integrity command. However, know that if a file is non-empty and has data streams created with Integrity Streams, you cannot disable the feature for that file. You cannot change the integrity status for a file once the file contains integrity data streams. You could copy the file to another partition, delete the original, and then copy it back without Integrity Streams.
Features of Microsoft’s ReFSThe main focus of new features is resilience, for example, automatically correcting data errors. Verifying with checksum before the write commits, and thus avoiding “torn writes”; it works by allocate-on-write, which never updates metadata in-place, but rather writes it to a different area of the disk, rather like “shadow paging”.
The graphic to the right shows how ReFS, uses some of the same code as NTFS, namely file system read, write, open, close, and change notification. But below this NTFS equivelent is a new architected engine that takes care of the MFT (Master File Table). Who Will Benefit Most From ReFS? |
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