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  • What are the advantages and disadvantages of the various virtual machine image formats?

    - by Matt
    Xen and Virtualbox etc both support a range of different virtual machine image formats. These are: vmdk, vdi, qcow & qcow2, hdd & vhd. Without any bias toward a particular product, I'm wanting to know what are the advantages and disadvantages of the various formats both from a features perspective, robustness and speed? One piece of info I discovered in a forum post was this: "The major difference is that VDI uses relatively large blocks (1MB) when growing an image, and thus has less overhead for block pointers etc. but isn't ultimately space efficient in the sense that if a single byte is non-zero in such a 1MB block the entire space is used. VMDK in contrast uses 64K blocks, and thus has more management overhead and generally a bit less disk space consumption What offsets this is that VDI is more efficient when it comes to snapshots." You might be thinking, I want to know this because I want to know which format to choose? Not exactly, I'm developing some software which utilises these formats and want to support one or more of them. Simplicity, large disks and ease of development are my main drivers.

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  • Wiping Deleted Directory Entries and Defragmenting Directories

    - by Synetech inc.
    Hi, I have seen plenty of apps that wipe free space on a disk (usually by creating a file that is as big as the remaining space) or defragment a file (usually by using the MoveFile API to copy it to a new contiguous area). What I have not seen however is a program that wipes the deleted directory entries. That is, when a file is deleted, its information (name, dates, etc.) remain in the directory, but are simply marked as empty. That leaves all kinds of information in a directory entry, and also wastes space since (at least on FAT drives), the directory may be using several clusters. For example, if a directory once had a lot of files, it will be expanded to use another cluster which could be anywhere on the disk. This means that the directory is fragmented, and may be using more clusters than needed, possibly with 100’s of unused (ie, “deleted file”) entries between active files. Does anyone know of a program that can defragment/consolidate directories (ie, wipe unused entries, and move active entries together)? (I would really rather not have to resort to writing my own yet again.) Thanks a lot. EDIT Sorry, I should have said, Windows and/or DOS, for FAT*/NTFS.

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  • how to uninstall ubuntu 8 from ubuntu 10 dual boot

    - by umar
    I have ubuntu 8.04 and ubuntu 10.04 on my laptop, and i want to reclaim all the ubuntu 8 space so that i have just one operating system on my laptop. how can i do it? the output of sudo fdisk -l is as follows: sudo fdisk -l Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x31a431a3 Device Boot Start End Blocks Id System /dev/sda1 * 1 4959 39833136 83 Linux /dev/sda2 4960 5233 2200905 82 Linux swap / Solaris /dev/sda3 5234 12852 61192552 83 Linux /dev/sda4 12852 19458 53062657 5 Extended /dev/sda5 12852 19182 50847744 83 Linux /dev/sda6 19182 19458 2213888 82 Linux swap / Solaris i dont know which of sda1, ..., sda 6 etc ubuntu 8 is on. how can i find that out? The actual task is that i think a lot of space is devoted to ubuntu 8, if there is no easy way to get rid of it, then i want to repartition the disk so that about 50 GB of hard disk space is given to ubuntu 10's home folder from the ubuntu 8's home folder. but i hope that there is an easy way to get rid of ubuntu 8 alrogether and just have ubuntu 10 on my system.

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  • Error when attempting to do a differential or incremental backup of Exchange using ntbackup

    - by voon
    Hi folks, We're running Small Business Server 2003 here. I was reviewing our backup procedures lately and noticed in the ntbackup logs that the differential backups of Exchange were failing with the error: (SERVERNAME)\Microsoft Information Store\First Storage Group is not a valid drive, or you do not have access. A quick search of google found this MS KB article: http://support.microsoft.com/kb/555613 However, both of the suggested fixes don't to apply to our problem. First solution is to make sure the backup media is formatted and has adequate space. Well, our backup target is a 1 TB external hard drive with about 600 gigs of free space. (A full backup of our Exchange DB is currently around 5 GB) The second suggested fix is to "perform a full backup before trying to do incremental". And again, that can't it because we are doing full backups twice a week. There are no errors in the application log, just entries for ntbackup starting and ending. I've also tested doing an differential & incremental backup onto the server's internal drive, which unsurprising still did not work. I could get around this problem by always doing a full backup of Exchange but I kind of like the idea of being space efficient with doing differential backups. Anyone got any ideas?

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  • Block protect (Keep last line of paragraph with next paragraph)

    - by Ed Cottrell
    Is there a way to force Microsoft Word 2010 to keep the last line of a paragraph with the next paragraph? An example of when this is relevant is when starting a block quote; it doesn't look good to have the block quote start at the top of a new page, particularly when it's introduced by a partial sentence, like this: "Lorem ipsum" is sample text widely used in the publishing industry, as the text has spacing roughly similar to that of English and therefore looks "normal" but unintelligible to an English reader's eye, allowing the reader to focus on design elements. It begins, Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam rhoncus laoreet risus, quis congue leo viverra congue. Suspendisse magna massa, viverra imperdiet est eu, ultrices volutpat lectus. Sed pulvinar est id risus lobortis venenatis. There shouldn't be a page break after "begins," because it looks like the sentence ends abruptly. "Keep lines together" won't work, because by definition we're talking about two paragraphs. "Keep with next" won't work if the first paragraph is larger than a couple of lines, because then you get an awkwardly large space at the bottom of a page. Manual line breaks obviously work, but only when the document is final, which is often less certain than it seems. I know WordPerfect has a feature called "block protect" that does this, but I have not found even an acceptable substitute in Word. I have played with style separators and hidden paragraph breaks, but to no avail. I would love a special character, kind of like the nonbreaking space or zero width optional space, that tells Word to move to the next page if the next paragraph would otherwise start the page. A macro would also be great, but I haven't been able to find a starting point (like how to detect where non-manual page breaks fall). Edit: It looks like "Keep with next" works this way in Word 2013, but I specifically need a fix that works in Word 2010.

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  • What GPT partition type to use for protecting DRBD metadata?

    - by Carsten Scholtes
    I'm planning to install a DRBD device on a (replicated) disk with two GPT partitions. DRBD requires some space for (preferentially "internal") metadata at the end of the underlying device. I'm hesitant to leave this space unpartitionend (or unformatted in a normal partition). I'd like to reserve an extra partition at the end of the underlying disk device for the metadata. (If I understand correctly, DRBD would not care about the partition or its type and could then use that space exclusively.) My question is: Which would be a suitable GPT partition type for such a metadata partition? It should not be a type interpreted while booting (such as EF00 EFI System). It should not be a type prone to be modified accidentialy by the booted OS (such as 8200 Linux swap, 8e00 Linux LVM, fd00 Linux raid). (The booted OS will be Ubuntu Linux 12.04.3.) It should not be a type indicating a normal filesystem (such as 0c01 or 8301), prone to be formatted correspondingly. It should not be a type requiring any special content in the partition (since the content is to be handled exclusively by DRBD). It should express the purpose of being reserved for something special (namely DRBD). (The types I listed are as provided by gdisk. I'm thinking about using some type unlikely to be used by the OS (maybe bf0a Solaris Reserved 4) or an invented(?) type such as fd01 (close to fd00 Linux raid…). Would something like this be suitable, too dangerous or even possible?)

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  • MSSQLSERVER Will Not Start - Event ID 913 and 1814

    - by ThaKidd
    Hello ServerFault! I need some serious help. I have a major database server down and am scratching my head at how to fix it. The server was hit by rolling black outs last week in Dallas and sense then, Microsoft SQL 2005 SP2 will not start up. I am getting the following errors (both when starting the service and while trying to execute mssqlsrv.exe -c -f -m: Event Type: Error Event Source: MSSQLSERVER Event ID: 913 Could not find database ID 3. Database may not be activated yet or may be in transition. Reissue the query once the database is available. If you do not think this error is due to a database that is transitioning its state and this error continues to occur, contact your primary support provider. Please have available for review the Microsoft SQL Server error log and any additional information relevant to the circumstances when the error occurred. and... Event Type: Information Event Source: MSSQLSERVER Event ID: 1814 Could not create tempdb. You may not have enough disk space available. Free additional disk space by deleting other files on the tempdb drive and then restart SQL Server. Check for additional errors in the event log that may indicate why the tempdb files could not be initialized. I have tried to rename the tempdb.mdf to tempdb.old with no success. I have checked and have 193 GB of free hard drive space. What else might cause this problem? Could the server need a chkdsk ran on it or do I need to be looking at some area of the database server? Any help is greatly appreciated. Thank you in advance.

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  • OS X, Chrome, and Spaces annoyance

    - by David Hollman
    Here's my problem: I use Google Chrome as my web browser on MacOS X Snow Leopard. I am a keyboard shortcut addict, and I use QuickSilver to create keyboard shortcuts for anything I can. One of the most common things that I do is to open a new web browser window. But I use Spaces frequently to partition my tasks that I am currently working on, and when I open a web browser or web page with a QuickSilver trigger, spaces switches to the last space that I used Chrome on and opens a new tab, which often distracts me for hours because it brings me to a different space and thus a different task. I can fix this by right-clicking on the Google Chrome icon and clicking the "New Window" option, which opens a new window on the current space. I have tried to compose an AppleScript to do something like this, with no success. It has become a serious problem. Back when I used Firefox, I solved the problem by changing a preference item that says "Always open pop-up links in a new window" or something like that, which was kind of a sledge hammer approach, but it worked. I can always go back to Firefox, but I thought I'd ask my question here first. Anyone with any ideas?

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  • How can I add subdomains of default accepted domain of Exchange 2010

    - by Christoph
    I have an Exchange 2010 that has several accepted domains. Now I want this server to accept - besides the default SMTP domain - all subdomains of the default domain. The documentation in Technet states When you create an accepted domain, you can use a wildcard character (*) in the address space to indicate that all subdomains of the SMTP address space are also accepted by the Exchange organization. For example, to configure Contoso.com and all its subdomains as accepted domains, enter *.Contoso.com as the SMTP address space. It is, however not possible to add e. g. *.contoso.com if contoso.com is already configured. Exchange complains in this case that the domain is already configured. It is also not possible to edit the "value", i. e. the domain name of an accepted domain. I know that I cannot modify the default accepted domain, but changing it to another does not help either, because the domain name itself can never be edited. The last idea was deleting the accepted domain and re-creating it with "*." prepended. This is, however, also impossible because it is of course not possible to delete or modify the default address policy and if a domain name is used in an address template it cannot be removed from the accepted domains. The question is: How can I make my Exchange 2010 server accept any subdomain of its default accepted domain with a wildcard?

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  • Can Safari 5.1 for Mac OS display favicons for bookmarks in the Bookmarks Bar?

    - by Greg R.
    When bookmarking a web site, most contemporary browser will display the site's favicon next to the bookmark, both in the bookmark view and the bookmark toolbar. This is a useful feature. In the bookmark toolbar you can edit the name of the bookmark to be blank, effectively leaving the favicon there as an easily identifiable "button" from which to launch the bookmark. This allows you to make more effective user of the space in the bookmark toolbar. I use this approach effectively in Firefox, Chrome, and IE. For example, here is a portion of my Bookmarks Toolbar from Firefox: However, in Safari, no favicon is ever displayed for bookmarks. In the full bookmark view only a generic globe icon is displayed. In the Bookmark Bar in Safari, no icon at all is displayed. Which means the habit of removing the bookmark name & leaving the favicon is useless. Here's what the same configuration (synced between browsers via Xmarks) looks like in Safari. That blank space is where the favicons should be. The boomark is there -- if you hover over it, the blank space changes color to indicate the presence of a bookmark and a tool tip will with the URL will pop up after about two seconds. However, it's really quite unusable. So. The question: is there an extension, plug-in, or modification of some sort that will enable the display of favicons for bookmarks in Safari (OS X Lion 10.7.3 , Safari version 5.1.3)?

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  • Linux commands shows different results

    - by ClydeFrog
    I'm really having a hard time to process these results on my Ubuntu server. I have a major problem with my JBoss server where I get FileNotFoundExceptions along with "No space left on device" errors. And I thought "maybe I'm out of disk space", and used df command to figure out how much I have left: root@ubuntu1:/# df -h Filsystem Storlek Anvnt Tillg Anv% Monterat på /dev/mapper/ubuntu1-root 36G 13G 21G 38% / none 2,0G 192K 2,0G 1% /dev none 2,0G 0 2,0G 0% /dev/shm none 2,0G 64K 2,0G 1% /var/run none 2,0G 0 2,0G 0% /var/lock /dev/sda1 228M 23M 193M 11% /boot /dev/mapper/vgdata-lvdata 79G 9,2G 66G 13% /data And as you can see, I have plenty of space left. And I also checked if I'm out of i-nodes: root@ubuntu1:/# df -i Filsystem Inoder IAnv IFria IAnv% Monterat på /dev/mapper/ubuntu1-root 2346512 61992 2284520 3% / none 505380 773 504607 1% /dev none 507383 1 507382 1% /dev/shm none 507383 30 507353 1% /var/run none 507383 2 507381 1% /var/lock /dev/sda1 124496 230 124266 1% /boot /dev/mapper/vgdata-lvdata 10486784 233945 10252839 3% /data But then i used du: root@ubuntu1:/# du -s -h /* 7,5M /bin 23M /boot 19G /data 192K /dev 11G /eniro 5,3M /etc 112K /home 0 /initrd.img 183M /lib 0 /lib64 16K /lost+found 12K /media 4,0K /mnt 4,0K /opt du: kan inte komma åt "/proc/20452/task/20452/fd/3": Filen eller katalogen finns inte du: kan inte komma åt "/proc/20452/task/20452/fdinfo/3": Filen eller katalogen finns inte du: kan inte komma åt "/proc/20452/fd/3": Filen eller katalogen finns inte du: kan inte komma åt "/proc/20452/fdinfo/3": Filen eller katalogen finns inte 0 /proc 18M /root 8,2M /sbin 4,0K /selinux 8,0K /srv 0 /sys 40K /tmp 691M /usr 1,2G /var 0 /vmlinuz Notice that /data and /eniro are 30G combined! How is it possible? Do I have a memory leak somewhere? Or is it something else? ----- EDIT 1 ----- Ok, I figured out that /data has its own mount so it's not possible to combine /data and /eniro because they aren't on the same mount. But how come it says 9,2G on the first command when it says 19G on the third on directory /data?

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  • Migrating away from LVM

    - by Kye
    I have an Ubuntu home media server setup with 4.5TB split across a few hard-drives (1x3TB, 2x1TB) and I'm using LVM2 to manage the volumes. I have recently added a 60GB SSD to my server, and I wish to use it to house the 'root' partition of my server (which is currently under the LVM group). I don't want to simply add it to the LVM volume group, because (afaik) there's no way to ensure that the SSD will be used for the root filesystem. If I just throw it at the VG, it may be used to house my media, which would defeat the purpose of having the SSD in the first place. I feel that my only solution is to somehow remove my root partition from the LVM setup and copy it across to the SSD. My boot partition is, of course, not part of the LVM group. My disk setup is as follows: 60GB SSD: EMPTY. 1TB HDD: /boot, LVM space. 1TB HDD: LVM space. 3TB HHD: LVM space. I have a few logical volumes. my root (/), a 'media' volume for my media collection, a backup one for my network backups.etc. Does anyone have any advice as to how to go about this? My end goal is to have the 60GB SSD used for my boot and root partitions, with everything else on the 3TB/1TB/1TB hard-drives.

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  • Sparing level on HP EVA 4000

    - by Samuel
    One of the disks of our EVA4000 died today. This diskgroup (all volumes vraid5 with sparing level 1 and almost no space left for more volumes, 1TiB drives) is being rebuilt with "spare space" right now, and it will take at least 15 hours to do the leveling/rebuilding. We can't get a new disk until Friday. So, the question is, what would happen if another disk dies before the leveling completes? Would we lose data? And after that, how many aditional disks could die before losing data? 1 or 2? In "usual" RAID, we would be vulnerable to data loss while the rebuild takes place, but in this case the space reserved for sparing is two times the size of the bigger disk, so at the very least the effect should be the same of having two spares. Thanks in advance. Update: I have found some interesting threads about this question but still can't answer to this question, so I'm starting a bounty. http://blog.thestoragearchitect.com/2008/10/27/understanding-eva/ http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&url=http%3A%2F%2Fwww.experts-exchange.com%2FStorage%2FStorage_Technology%2FQ_25548177.html (Expert Exchange question from google).

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  • Missing MB on a GPT partioned SSD

    - by pisswillis
    I recently installed Arch Linux on an Intel 40GB SSD. I used GPT for partioning (via GNU parted) and created the following partions: /dev/sda1 : 1 MB, no FS, flag=bios_grub /dev/sda2 : 30MB, /boot, ext2, flag=boot /dev/sda3 : 20GB, /home, ext4 /dev/sda4 : ~20GB, /, ext4 After struggling to install grub2 from the livecd environment (which I finally did via grub-install /dev/sda --root-directory=/mnt/ --no-floppy --force) I got a working system. However, when I was inspecting disk usage with df I noticed that my home partition had around 170MB of used space on it. This surprised me because the only things on /home were one users .bashrc, .bash_history, and .lesshst. du confirmed that there was only a few KB of space being used on /home. Why does df report approximately 170MB being used when du does not? Is this space "gone forever", or can I regain it by repartioning and/or reinstalling? When I installed grub2 it said something along the lines of "your embed area is too small", and that I could "use BLOCKLISTS, but BLOCKLISTS are UNRELIABLE". In the end the only way I could get a system booting from the SSD was to use blocklists via the grub-install --force flag. Is this related to the mysterious missing 170MB? Thanks

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  • mysqld crashes on any statement

    - by ??iu
    I restarted my slave to change configuration settings to skip reverse hostname lookup on connecting and to enable the slow query log. I edited /etc/my.cnf making only these changes, then restarted mysqld with /etc/init.d/mysql restart All appeared to be well but when I connect to msyqld remotely or locally though it connects okay a slight problem is that mysqld crashes whenever you try to issue any kind of statement. The client looks like: Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 3 Server version: 5.1.31-1ubuntu2-log Type 'help;' or '\h' for help. Type '\c' to clear the buffer. mysql> show tables; ERROR 2006 (HY000): MySQL server has gone away No connection. Trying to reconnect... Connection id: 1 Current database: mydb ERROR 2006 (HY000): MySQL server has gone away No connection. Trying to reconnect... ERROR 2003 (HY000): Can't connect to MySQL server on 'xx.xx.xx.xx' (61) ERROR: Can't connect to the server ERROR 2006 (HY000): MySQL server has gone away No connection. Trying to reconnect... ERROR 2003 (HY000): Can't connect to MySQL server on 'xx.xx.xx.xx' (61) ERROR: Can't connect to the server ERROR 2006 (HY000): MySQL server has gone away Bus error The mysqld error log looks like: 101210 16:35:51 InnoDB: Error: (1500) Couldn't read the MAX(job_id) autoinc value from the index (PRIMARY). 101210 16:35:51 InnoDB: Assertion failure in thread 140245598570832 in file handler/ha_innodb.cc line 2595 InnoDB: Failing assertion: error == DB_SUCCESS InnoDB: We intentionally generate a memory trap. InnoDB: Submit a detailed bug report to http://bugs.mysql.com. InnoDB: If you get repeated assertion failures or crashes, even InnoDB: immediately after the mysqld startup, there may be InnoDB: corruption in the InnoDB tablespace. Please refer to InnoDB: http://dev.mysql.com/doc/refman/5.1/en/forcing-recovery.html InnoDB: about forcing recovery. 101210 16:35:51 - mysqld got signal 6 ; This could be because you hit a bug. It is also possible that this binary or one of the libraries it was linked against is corrupt, improperly built, or misconfigured. This error can also be caused by malfunctioning hardware. We will try our best to scrape up some info that will hopefully help diagnose the problem, but since we have already crashed, something is definitely wrong and this may fail. key_buffer_size=16777216 read_buffer_size=131072 max_used_connections=3 max_threads=600 threads_connected=3 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1328077 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. thd: 0x18209220 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... stack_bottom = 0x7f8d791580d0 thread_stack 0x20000 /usr/sbin/mysqld(my_print_stacktrace+0x29) [0x8b4f89] /usr/sbin/mysqld(handle_segfault+0x383) [0x5f8f03] /lib/libpthread.so.0 [0x7f902a76a080] /lib/libc.so.6(gsignal+0x35) [0x7f90291f8fb5] /lib/libc.so.6(abort+0x183) [0x7f90291fabc3] /usr/sbin/mysqld(ha_innobase::open(char const*, int, unsigned int)+0x41b) [0x781f4b] /usr/sbin/mysqld(handler::ha_open(st_table*, char const*, int, int)+0x3f) [0x6db00f] /usr/sbin/mysqld(open_table_from_share(THD*, st_table_share*, char const*, unsigned int, unsigned int, unsigned int, st_table*, bool)+0x57a) [0x64760a] /usr/sbin/mysqld [0x63f281] /usr/sbin/mysqld(open_table(THD*, TABLE_LIST*, st_mem_root*, bool*, unsigned int)+0x626) [0x641e16] /usr/sbin/mysqld(open_tables(THD*, TABLE_LIST**, unsigned int*, unsigned int)+0x5db) [0x6429cb] /usr/sbin/mysqld(open_normal_and_derived_tables(THD*, TABLE_LIST*, unsigned int)+0x1e) [0x642b0e] /usr/sbin/mysqld(mysqld_list_fields(THD*, TABLE_LIST*, char const*)+0x22) [0x70b292] /usr/sbin/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0x146d) [0x60dc1d] /usr/sbin/mysqld(do_command(THD*)+0xe8) [0x60dda8] /usr/sbin/mysqld(handle_one_connection+0x226) [0x601426] /lib/libpthread.so.0 [0x7f902a7623ba] /lib/libc.so.6(clone+0x6d) [0x7f90292abfcd] Trying to get some variables. Some pointers may be invalid and cause the dump to abort... thd->query at 0x18213c70 = thd->thread_id=3 thd->killed=NOT_KILLED The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains information that should help you find out what is causing the crash. 101210 16:35:51 mysqld_safe Number of processes running now: 0 101210 16:35:51 mysqld_safe mysqld restarted InnoDB: The log sequence number in ibdata files does not match InnoDB: the log sequence number in the ib_logfiles! 101210 16:35:54 InnoDB: Database was not shut down normally! InnoDB: Starting crash recovery. InnoDB: Reading tablespace information from the .ibd files... InnoDB: Restoring possible half-written data pages from the doublewrite InnoDB: buffer... 101210 16:35:56 InnoDB: Started; log sequence number 456 143528628 101210 16:35:56 [Warning] 'user' entry 'root@PSDB102' ignored in --skip-name-resolve mode. 101210 16:35:56 [Warning] Neither --relay-log nor --relay-log-index were used; so replication may break when this MySQL server acts as a slave and has his hostname changed!! Please use '--relay-log=mysqld-relay-bin' to avoid this problem. 101210 16:35:56 [Note] Event Scheduler: Loaded 0 events 101210 16:35:56 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.1.31-1ubuntu2-log' socket: '/var/run/mysqld/mysqld.sock' port: 3306 (Ubuntu) 101210 16:36:11 InnoDB: Error: (1500) Couldn't read the MAX(job_id) autoinc value from the index (PRIMARY). 101210 16:36:11 InnoDB: Assertion failure in thread 139955151501648 in file handler/ha_innodb.cc line 2595 InnoDB: Failing assertion: error == DB_SUCCESS InnoDB: We intentionally generate a memory trap. InnoDB: Submit a detailed bug report to http://bugs.mysql.com. InnoDB: If you get repeated assertion failures or crashes, even InnoDB: immediately after the mysqld startup, there may be InnoDB: corruption in the InnoDB tablespace. Please refer to InnoDB: http://dev.mysql.com/doc/refman/5.1/en/forcing-recovery.html InnoDB: about forcing recovery. 101210 16:36:11 - mysqld got signal 6 ; This could be because you hit a bug. It is also possible that this binary or one of the libraries it was linked against is corrupt, improperly built, or misconfigured. This error can also be caused by malfunctioning hardware. We will try our best to scrape up some info that will hopefully help diagnose the problem, but since we have already crashed, something is definitely wrong and this may fail. key_buffer_size=16777216 read_buffer_size=131072 max_used_connections=1 max_threads=600 threads_connected=1 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1328077 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. thd: 0x18588720 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... stack_bottom = 0x7f49d916f0d0 thread_stack 0x20000 /usr/sbin/mysqld(my_print_stacktrace+0x29) [0x8b4f89] /usr/sbin/mysqld(handle_segfault+0x383) [0x5f8f03] /lib/libpthread.so.0 [0x7f4c8a73f080] /lib/libc.so.6(gsignal+0x35) [0x7f4c891cdfb5] /lib/libc.so.6(abort+0x183) [0x7f4c891cfbc3] /usr/sbin/mysqld(ha_innobase::open(char const*, int, unsigned int)+0x41b) [0x781f4b] /usr/sbin/mysqld(handler::ha_open(st_table*, char const*, int, int)+0x3f) [0x6db00f] /usr/sbin/mysqld(open_table_from_share(THD*, st_table_share*, char const*, unsigned int, unsigned int, unsigned int, st_table*, bool)+0x57a) [0x64760a] /usr/sbin/mysqld [0x63f281] /usr/sbin/mysqld(open_table(THD*, TABLE_LIST*, st_mem_root*, bool*, unsigned int)+0x626) [0x641e16] /usr/sbin/mysqld(open_tables(THD*, TABLE_LIST**, unsigned int*, unsigned int)+0x5db) [0x6429cb] /usr/sbin/mysqld(open_normal_and_derived_tables(THD*, TABLE_LIST*, unsigned int)+0x1e) [0x642b0e] /usr/sbin/mysqld(mysqld_list_fields(THD*, TABLE_LIST*, char const*)+0x22) [0x70b292] /usr/sbin/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0x146d) [0x60dc1d] /usr/sbin/mysqld(do_command(THD*)+0xe8) [0x60dda8] /usr/sbin/mysqld(handle_one_connection+0x226) [0x601426] /lib/libpthread.so.0 [0x7f4c8a7373ba] /lib/libc.so.6(clone+0x6d) [0x7f4c89280fcd] Trying to get some variables. Some pointers may be invalid and cause the dump to abort... thd->query at 0x18599950 = thd->thread_id=1 thd->killed=NOT_KILLED The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains information that should help you find out what is causing the crash. 101210 16:36:11 mysqld_safe Number of processes running now: 0 101210 16:36:11 mysqld_safe mysqld restarted The config is [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice = 0 [mysqld] innodb_file_per_table innodb_buffer_pool_size=10G innodb_log_buffer_size=4M innodb_flush_log_at_trx_commit=2 innodb_thread_concurrency=8 skip-slave-start server-id=3 # # * IMPORTANT # If you make changes to these settings and your system uses apparmor, you may # also need to also adjust /etc/apparmor.d/usr.sbin.mysqld. # user = mysql pid-file = /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /DB2/mysql tmpdir = /tmp skip-external-locking # # Instead of skip-networking the default is now to listen only on # localhost which is more compatible and is not less secure. #bind-address = 127.0.0.1 # # * Fine Tuning # key_buffer = 16M max_allowed_packet = 16M thread_stack = 128K thread_cache_size = 8 # This replaces the startup script and checks MyISAM tables if needed # the first time they are touched myisam-recover = BACKUP max_connections = 600 #table_cache = 64 #thread_concurrency = 10 # # * Query Cache Configuration # query_cache_limit = 1M query_cache_size = 32M # skip-federated slow-query-log skip-name-resolve Update: I followed the instructions as per http://dev.mysql.com/doc/refman/5.1/en/forcing-innodb-recovery.html and set innodb_force_recovery = 4 and the logs are showing a different error but the behavior is still the same: 101210 19:14:15 mysqld_safe mysqld restarted 101210 19:14:19 InnoDB: Started; log sequence number 456 143528628 InnoDB: !!! innodb_force_recovery is set to 4 !!! 101210 19:14:19 [Warning] 'user' entry 'root@PSDB102' ignored in --skip-name-resolve mode. 101210 19:14:19 [Warning] Neither --relay-log nor --relay-log-index were used; so replication may break when this MySQL server acts as a slave and has his hostname changed!! Please use '--relay-log=mysqld-relay-bin' to avoid this problem. 101210 19:14:19 [Note] Event Scheduler: Loaded 0 events 101210 19:14:19 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.1.31-1ubuntu2-log' socket: '/var/run/mysqld/mysqld.sock' port: 3306 (Ubuntu) 101210 19:14:32 InnoDB: error: space object of table mydb/__twitter_friend, InnoDB: space id 1602 did not exist in memory. Retrying an open. 101210 19:14:32 InnoDB: error: space object of table mydb/access_request, InnoDB: space id 1318 did not exist in memory. Retrying an open. 101210 19:14:32 InnoDB: error: space object of table mydb/activity, InnoDB: space id 1595 did not exist in memory. Retrying an open. 101210 19:14:32 - mysqld got signal 11 ; This could be because you hit a bug. It is also possible that this binary or one of the libraries it was linked against is corrupt, improperly built, or misconfigured. This error can also be caused by malfunctioning hardware. We will try our best to scrape up some info that will hopefully help diagnose the problem, but since we have already crashed, something is definitely wrong and this may fail. key_buffer_size=16777216 read_buffer_size=131072 max_used_connections=1 max_threads=600 threads_connected=1 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1328077 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. thd: 0x1753c070 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... stack_bottom = 0x7f7a0b5800d0 thread_stack 0x20000 /usr/sbin/mysqld(my_print_stacktrace+0x29) [0x8b4f89] /usr/sbin/mysqld(handle_segfault+0x383) [0x5f8f03] /lib/libpthread.so.0 [0x7f7cbc350080] /usr/sbin/mysqld(ha_innobase::innobase_get_index(unsigned int)+0x46) [0x77c516] /usr/sbin/mysqld(ha_innobase::innobase_initialize_autoinc()+0x40) [0x77c640] /usr/sbin/mysqld(ha_innobase::open(char const*, int, unsigned int)+0x3f3) [0x781f23] /usr/sbin/mysqld(handler::ha_open(st_table*, char const*, int, int)+0x3f) [0x6db00f] /usr/sbin/mysqld(open_table_from_share(THD*, st_table_share*, char const*, unsigned int, unsigned int, unsigned int, st_table*, bool)+0x57a) [0x64760a] /usr/sbin/mysqld [0x63f281] /usr/sbin/mysqld(open_table(THD*, TABLE_LIST*, st_mem_root*, bool*, unsigned int)+0x626) [0x641e16] /usr/sbin/mysqld(open_tables(THD*, TABLE_LIST**, unsigned int*, unsigned int)+0x5db) [0x6429cb] /usr/sbin/mysqld(open_normal_and_derived_tables(THD*, TABLE_LIST*, unsigned int)+0x1e) [0x642b0e] /usr/sbin/mysqld(mysqld_list_fields(THD*, TABLE_LIST*, char const*)+0x22) [0x70b292] /usr/sbin/mysqld(dispatch_command(enum_server_command, THD*, char*, unsigned int)+0x146d) [0x60dc1d] /usr/sbin/mysqld(do_command(THD*)+0xe8) [0x60dda8] /usr/sbin/mysqld(handle_one_connection+0x226) [0x601426] /lib/libpthread.so.0 [0x7f7cbc3483ba] /lib/libc.so.6(clone+0x6d) [0x7f7cbae91fcd] Trying to get some variables. Some pointers may be invalid and cause the dump to abort... thd->query at 0x1754d690 = thd->thread_id=1 thd->killed=NOT_KILLED The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains information that should help you find out what is causing the crash.

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  • Unexpected(?) high 'wasted' memory in memcached

    - by Nanne
    Looking at our memcached stats I think I have found an issue I was not aware of before. It seems that we have a strangely high amount of wasted space. I checked with phpmemcacheadmin for a change, and found this image staring at me: Now I was under the impression that the worst-case scenario would be that there is 50% waste, although I am the first to admit not knowing all the details. I have read - amongst others- this page which is indeed somewhat old, but so is our version of memcached. I think I do understand how the system works (e.g.) I believe, but I have a hard time understanding how we could get to 76% wasted space. The eviction rate that phpmemcacheadmin shows is 2 ev/s, so there is some problem here. The primary question is: what can I do to fix this. I could throw more memory at it (there is some extra available I think), maybe I should fiddle with the slab config (is that even possible with this version?), maybe there are other options? Upgrading the memcached version is not a quickly available option. The secondairy question, out of curiosity, is of course if the rate of 75% (and rising) wasted space is expected, and if so, why. System: This is currently not something I can do anything about, I know the memcached version isn't the newest, but these are the cards I've been dealt. Memcached 1.4.5 Apache 2.2.17 PHP 5.3.5

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  • How do I batch-downsize images on linux, while keeping small images small?

    - by Gabriel
    I have a whole lot of photos and it's time to clean up the mess and free some disk space. I know mogrify is great to batch-resize things down. The problem is, in some directories I have small images mixed with the big ones. I'd like to batch-downsize all the big one but not upsize the small ones. As an example, I have a rep with tens of MBs-pictures in the 3000x2000s. Some of them I have already downsized so I could email them. They may be 1024x768. I'd like to downsize the big ones to 1600x1200, a disk-space-to-quality tradeoff I like. But then, with mogrify or convert, the small ones will be upsized, which would be a waste of disk space. I found some tricky ways to use identify with cut and some scripting to filter the small pics out and mogrify the others, but man, there's got a way to tell mogrify not to upsize my pics... How ? Is there some other tool better suited ?

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  • Regarding partitions for dual-booting Ubuntu with pre-existing Windows 7

    - by Shasteriskt
    I have zero actual experience with configuring disk partitions and the stuff I have read for the past few hours have been confusing me a bit, so please bear with me. First of all, I'd like to explain what I'm setting to achieve: Windows 7 with: C:\ Windows 7 (pre-existing installation) D:\ Data (Already exists and has files already) Ubuntu 11 - Does not exist yet, but I already have a LiveCD in hand. \root directory for Ubuntu \home on its own partition I plan \swap on its own partition with around 8GB Here is the current situation: I have a single 500 GB hard-disk with Windows 7 x64 installed, and the current partition schemes is as follows: System Reserved: 100 MB (Primary, Active) C: 100 GB - Where Windows 7 is installed (Primary) D: 365 GB - Where my files are located, LOTS of free space (Primary) Now, I would like to shrink my D: drive and create around 40 GB of unallocated disk space for the Ubuntu installation, but here what's confusing me a bit: I'm thinking I would create an extended partition and subdivide it into 3 logical partitions for the Ubuntu setup I had in mind. (If you think my setup is a bad idea, please let me know & why. I also hope you can suggest a better one...) I am aware that I can only have up to 4 primary partitions, or 3 primary partitions with 1 extended parition max. Now, does the System Recovery portion count as one primary partition? I'm really new to these things and it is totally unclear to me. In shrinking my D: drive using Windows 7's Disk Management tool, I would get an unallocated free space which I don't know how to make an extended partition from. It seems like I can only create a primary partition from it, not an extended one. How do I go about it? (I'd also like to note, if it is of any importance, that I am trying to avoid using the option to install Ubuntu alongside Windows, and much rather prefer using the custom install where I can specify which drives I wish to use and stuff. Somehow I feel its safer that way.)

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  • Disk doesn't contain a valid partition table

    - by Jeevan Dongre
    I was running a m1.small instance ec2 ubuntu instance. I was running out of disk space, so I upgraded my instance to medium. When I upgraded I actually got 429.5 GB of space and after that I added 10 gb of volume too. When I run the "sudo fdisk -l" command I got this results. Disk /dev/sda1: 8589 MB, 8589934592 bytes 255 heads, 63 sectors/track, 1044 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sda1 doesn't contain a valid partition table Disk /dev/sda2: 429.5 GB, 429461078016 bytes 255 heads, 63 sectors/track, 52212 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sda2 doesn't contain a valid partition table Disk /dev/sdf: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 sda1 is the primary parition and sda2 is what I got added upgrading my system to medium. But the problem persists, I am not able to pull the code from git, it is giving me this error. remote: Counting objects: 409, done. remote: Compressing objects: 100% (236/236), done. fatal: write error: No space left on device fatal: index-pack failed

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  • Live Messenger SimilarityTable2 file

    - by adrianbanks
    I am trying to free up some space on my laptop's hard disk and am using a tool (SpaceMonger) that will show me a treemap of the whole disk. The problem I have comes from Live Messenger's SimilarityTable2 file. I have no idea what it is for, but I know that it is a sparse file, meaning that it shows as taking up 8GB of disk space, but actually only takes up 132KB of space on disk. The problem is that because SpaceMonger thinks this file is 8GB, it swamps the other files and takes up most of the treemap, making it hard to see the other files that really are large. Is this file safe to delete? If not, how do I make its actual size on disk match its reserved size? If that's not possible, how can I make SpaceMonger (or another treemap tool) use the real size of the file and not the reserved size? EDIT: I've just realised that I have some NTFS junctions set up, meaning that the same set of directories appear twice. Is there any way to stop this happening as well?

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  • What does it mean to install two OS's alongside each other?

    - by Josh
    I currently have Windows 7 installed on my PC. However, I just tried out Ubuntu via booting from a disc and I love it. I want to install it onto my HDD, but I don't want to get rid of Windows 7. I know HOW to do this, but I am a little unsure what the consequences might be. What does it mean to install Ubuntu alongside Windows? Do they share the same resources? Also, I have my HDD already partitioned into two sections, a 70 GB section where Windows is installed and then another 400 GB section where all my data is stored. There is currently 26 GB free on the 70GB partition. I know Ubuntu doesn't take up much space. However, if I install Ubuntu in that space, will I still be able to install programs on Windows in the future? My main concern is that I am going to short-change my hard drive space for future installations. EDIT: I guess another big question I have is if I install a program on one OS, will the other be able to use it?

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  • How to start MSSQL Server with corrupt model db

    - by Jordan McGuigan
    After moving some databases around (restoring, deleting, etc) we experienced an issue creating new databases. Specifically, When trying to create a new database MSSQL Server it failed because the "The database 'model' is marked RESTORING and is in a state that does not allow recovery to be run". As some online solutions suggested, we tried to Start and Stop the MSSQL Service. Service would not restart because "Could not create tempdb. You may not have enough disk space available. Free additional disk space by deleting other files on the tempdb drive" (FYI: the drive has 100gb of free space). Tried restarting the machine the MSSQL Server is running on. When the server came back online, we received the same error. We have tried deleting tempdb.mdf and restoring the modeldb from the templates folder, but neither of these solved the issue. We are unable to connect to the database, even in single user mode. Many of the online solutions have us running SQL commands against the server, but we are unable to connect (even in single user mode) to the DB to run commands against the server. Specific error messages: Database 'model' cannot be opened. It is in the middle of a restore. (Microsoft SQL Server, Error: 927) The SQL Server (MSSQLSERVER) service is starting. The SQL Server (MSSQLSERVER) service could not be started. A service specific error occurred: 1814. We need the server up and running again ASAP.

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  • Using multiple USB webcams in Linux

    - by rachelderp
    Running more than one USB webcam in Debian/Linux results in the the following error: libv4l2: error turning on stream: No space left on device VIDIOC_STREAMON: No space left on device What initially seemed to be a programming issue in OpenCV turned into a quest for a mysterious hardware/software problem after the same errors were produced by running cheese and xawtv. Apparently it's caused by webcams requesting all the available bandwidth on the USB host controller. With that in mind I decided to run wireshark and capinfos to see just how much bandwidth a single camera used. 4 megabits per second at 320x240 14 megabits per second at 640x480 32 megabits per second at 1920x1080 Interesting! That might explain why two cameras at 320x240 work but any higher resolution fails. It's as if my USB controller is only operating at USB 1 speeds, yet lsusb shows both webcams belonging to a device which supposedly supports 480 megabits per second. One solution proposed forcing the webcams to calculate their bandwidth usage instead of requesting their maximum by running the following commands: sudo rmmod uvcvideo sudo modprobe uvcvideo quirks=128 Unfortunately that made no difference, so I decided to try another solution. A post on StackOverflow suggested telling my webcams to use a lower FPS or compressed video format like MJPEG, but after running v4lctl list it doesn't appear either of my webcams support changing their video mode. And that's where I'm stuck. Why would two webcams operating well below the maximum speed of USB 2 would produce this error? ps: It's not a disk space issue, df displays no change when the webcams are started. pps: If it makes a difference, here's the output of lsusb

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  • Killing a process which ran for a lot of time or is using a lot of memory

    - by Vedant Terkar
    I am not sure whether this question belong to Stack Overflow or here, but here we go. I am designing a online 'C' compiler, which will compile and invoke the program if compilation succeeded. So here is code which I am using for that: $str=shell_exec("gcc path/to/file.c -o path/to/file.exe 2>&1"); if(file_exists("path/to/file.exe")){ $res=shell_exec("path/to/file.exe <inputfile 2>&1"); echo $res; } This Seems to work fine with simple program files. But When file.c That is the source code entered contains Infinite loop then This script crashes the server and utilizes a lot of memory and time. So here is my question: Is There any way to detect for how much time does the process file.exe is Running? How Much Space is Utilized by that process that is file.exe? Is There any way to kill the process file.exe if space and time utilization increases beyond certain limit? That Mean if we allocate time of 2.5sec and space of 40Mb at max for that process file.exe and if any one of those 2 constraints is violated then we should display appropriate error message to client Is it possible? I am Using WAMP (Windows 7).

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  • Can't create system image. 0x80780119 error after upgrade from 8 to 8.1

    - by cichy202
    I have upgraded my Windows 8 PC to 8.1 yesterday and it seemed like everything is working fine until I tried to create System Image. I got an error 0x80780119 saying that there is to little space on one of the partitions. I started looking into this problem and indeed one of the partitions does not meet the requirements. There are following partitions on my drive: DISKPART> list partition Partition ### Type Size Offset ------------- ---------------- ------- ------- Partition 1 Recovery 300 MB 1024 KB Partition 2 System 100 MB 301 MB Partition 3 Reserved 128 MB 401 MB Partition 4 Primary 74 GB 529 MB Partition 5 Primary 390 GB 75 GB Partition 1 has only 13MB free space. Partition 2 has 70MB free space, partition 3 is MSFTRES, partition 4 is my C drive with around 35GB free and partition 5 is not included in system image. Partitions were create like this during installation of Windows 8 - clean install from scratch. I am using UEFI so the drive is GPT formatted. So I thought, OK I can resize my C drive a little, move the partitions and expand the 1st one. I tried using GParted but it is not able to move the MSFTRES partition. It does not recognize the file system on it. So the question is: Is it possible to "clean up" the 1st partition in anyway? If not, is there anything special about MSFTRES partition? Or can I just remove it and create it a little further and just flag it as msftres with GParted?

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