SMART is a mnemonic acronym, giving criteria to guide in the setting of objectives, for example in project management, employee-performance management and personal development. The letters S and M usually mean specific and measurable. The other letters have meant different things to different authors, as described below. Additional letters have been added by some authors. SMART criteria are commonly associated with Peter Drucker’s management by objectives concept. The first-known use of the term occurs i
Source: SMART criteria – Wikipedia
So here’s an interesting situation I ran into when using Windows 7 connected to both my Ethernet network and my wireless network at home: whenever I would
MySQL replication is a core process for maintaining multiple copies of data – and replication is a very important aspect in database administration. In order to synchronize data between master and slaves you need to make sure that data transfers smoothly, and to do so you need to act promptly regarding replication errors to continue data synchronization. Here on the Percona Support team, we often help customers with replication broken-related issues. In this post I’ll highlight the top most critical replication error code 1236 along with the causes and cure. MySQL replication error “Got fatal error 1236” can be triggered by multiple reasons and I will try to cover all of them.
My disk space is dwindling by about 2GB a day! I only have a few more days before I run out of space.
$ df -h Filesystem Size Used Avail Use% Mounted on /dev/sda4 143G 126G 11G 93% / udev 491M 4.0K 491M 1% /dev tmpfs 200M 696K 199M 1% /run none 5.0M 0 5.0M 0% /run/lock none 499M 144K 499M 1% /run/shm /dev/sda2 1.9G 580M 1.2G 33% /tmp /dev/sda1 92M 29M 58M 33% /boot
I have been searching for the biggest directories/log files, deleting and compressing. But I am still losing the war. Finally, I realised I have a big misunderstanding:
julian@server1:~$ sudo du -h / | tail -n 1 16G /
All of my files in / only add up to 16 GB. That leaves 110 GB unaccounted for!
Clearly I have a misunderstanding: I thought the ‘/dev/sda4’ line represented all the files visible from ‘/’. What should I be reading to understand where the other storage has gone?
- I have an Ubuntu 11.10 server, that was set-up by data-center staff.
- It is running
- my own code (which is fairly prolific with log files, but otherwise doesn’t store much stuff on the drive)
- duplicity for backups (which tends to store a lot of signature files)
- various other standard services, like Apache, nagios, etc. They are very lightly used.
- It has been up for about 4 months without a reboot.
- I lied about the du output (simplified it for effect). It also complained about not being able to access GVFS and the du processes’s own resources. I believe they are irrelevant:
du: cannot access `/home/julian/.gvfs': Permission denied du: cannot access `/proc/10841/task/10841/fd/4': No such file or directory du: cannot access `/proc/10841/task/10841/fdinfo/4': No such file or directory du: cannot access `/proc/10841/fd/4': No such file or directory du: cannot access `/proc/10841/fdinfo/4': No such file or directory