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• Installing Oracle11gr2 on redhat linux

  - by KItis

  I have basic question about installing applications on linux operating system. i am going to express my issue considering oracle db installation as a example. when installing oracle database , i created a user group called dba and and user in this group called ora112. so this users is allowed to install database. so my question is if ora112 uses umaks is set to 077, then no other uses will be able to configure oracle database. why do we need to follow this practice. is it a accepted procedure in application installation on Linux. please share your experience with me. thanks in advance for looking into this issue say i install java application on this way. then no other application which belongs to different user account won't be able use java running on this computer because of this access restriction.

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• High shmmax value in Redhat 6.3

  - by xpapad

  We are using Redhat 6.3 with 30G RAM to host our Postgres server. The (default) shmmax value is 68,719,476,736 In some forums I have read that having an shmmax value larger than the RAM causes extensive paging, but in the Redhat forums it warns against changing a kernel parameter that is already configured to a value larger than the minimum requirements for an environment. In ServerFault I've read that this probably has no impact. So is there any impact of having shmmax value RAM in a DB server, or the kernel understands this and handles it appropriately? Thanks

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• Bind dns server in Solaris 10 and win xp clients

  - by stevecomptech

  Hi, Added this in zone db file, I am running solaris 10 _ldap._tcp.mydomain.com. SRV 0 0 389 dc.mydomain.com. _kerberos._tcp.mydomain.com. SRV 0 0 88 dc.mydomain.com. _ldap._tcp.dc._msdcs.mydomain.com. SRV 0 0 389 dc.mydomain.com. _kerberos._tcp.dc._msdcs.mydomain.com. SRV 0 0 88 host.mydomain.com. Now I get this error when I try to join win xp to the domain The query was for the SRV record for _ldap._tcp.dc._msdcs.mydomain.com The following domain controllers were identified by the query: host.mydomain.com Common causes of this error include: Host (A) records that map the name of the domain controller to its IP addresses are missing or contain incorrect addresses. Domain controllers registered in DNS are not connected to the network or are not running. What do I need to change in order my win xp join the domain

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• How to migrate Lotus Notes Mail in database to Exchange public folder?

  - by elsni

  I need to migrate a Lotus Notes Mail database to Exchange. In the past, Users get mails in their Notes mail accounts and sort them manually by drag and drop in a specific folder structure in a seperate Notes mail database. This should be mapped to Exchange. I considered using outlook and a sharepoint Library mapped to outlook, but Outlook does not support drag and drop from the mail account to a standard doclib and the discussion libs do not support folders. So I think it's the easiest way to use an Exchange public folder instead of a sharepoint lib, which should work as in Notes (correct me if I'm wrong). But how I do migrate the old Notes db to the public folder including all subfolders? Thank you!

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• Backing up data (including mysqldumps) to S3

  - by seengee

  We have a web app on a number of servers and we want to add an additional layer of redundancy by backing up the key data to S3. The key data is the MySQL database and a folder containing dynamically created site assets - predominantly images. Some kind of rsync based solution would initially seem the best plan. A couple of years ago we played with S3cmd (in particular s3cmd sync) with some success but we didn't find it particularly reliable although this may have changed since. Its occurred to me though that a rsync solution might not work particularly well with a single db.sql file created with mysqldump and I assume this means the whole database getting transferred each time, with multiple databases of over 1GB this is going to add up to a lot of traffic (and $s) very quickly. With the image files I could simply just transfer files modified within the last day which would be far more simple. What approach should I look at?

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• Postgres backup

  - by Abbass

  Hello, I have a Bacula script that does an automatic backup of a Postgres Database. The script makes two backups using (pg_dump) of the data base : The schema only and the data only. /usr/bin/pg_dump --format=c -s $dbname --file=$DUMPDIR/$dbname.schema.dump /usr/bin/pg_dump --format=c -a $dbname --file=$DUMPDIR/$dbname.data.dump The problem is that I can't figure out how to restore it with pg_restore. Do I need to create the database and the users before then restore the schema and finally the data. I did the following : pg_restore --format=c -s -C -d template1 xxx.schema.dump pg_restore --format=c -a -d xxx xxx.data.dump This first restore creates the database with emtpy tables but the second gives many error like this one : pg_restore: [archiver (db)] COPY failed: ERROR: insert or update on table "Table1" violates foreign key constraint "fkf6977a478dd41734" DETAIL: Key (contentid)=(1474566) is not present in table "Table23". Any ideas?

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• Rsync fails for files that start with underscore when destination is zfs

  - by Eric

  everyone. I'm using rsync3.1.0pre1 on Mac OS X 10.8.5, and am trying to rsync one folder to another. The destination is a ZFS volume mounted via SMB. The problem I'm having is that files that start with underscore (e.g., '_filename.jpg') are not being successfully synced to the destination. I get the following error message: rsync: mkstemp "/path/to/destination/._filename.jpg.NUgYJw" failed: Permission denied (13) In this case, '_filename.jpg' does not make it to the destination. I understand that rsync creates hidden, temporary files at the destination which are preceded with '.' and have a random file extension appended on the end. But the original filename starts with '', not '.', and I haven't asked rsync to copy extended attributes / resource forks over (unless it always does it). The rsync command I'm using is: rsync -avE --exclude='.DS_Store' --exclude '.Trash' --exclude 'Thumbs.db' --exclude '._*' --delete /source/ /destination/ Has anyone found a way around this problem? Thank you!

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• Apache httpd + FreeTDS hangs until restarted

  - by Jordan Reiter

  Every so often requests to a Linux server (say, linux.example.org) where the web app (Django) pulls in data from a SQL Server database via FreeTDS will hang. Requests on other servers pointing to the database still work, as do requests on linux.example.org that use local MySQL databases. Only the server plus FreeTDS appear to be affected. Restarting httpd makes the database connections work correctly again. What could cause this problem? Using: Centos 5.9 freetds 0.91 Apache httpd 2.2.3 /etc/obdc.ini: [DSN] Description = SQL Server 2005 Driver = FreeTDS ;Database = dbname Servername = SERVERNAME ;TDS_Version = 8.0 /etc/freetds.conf: [SERVERNAME] driver = /usr/lib64/libtdsodbc.so host = db.example.org port = 1433 tds version = 8.0 client charset = UTF-8

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• Web server replica not working in other server

  - by user761076

  I have a Drupal installation (php+mysql) in a server, and I'm trying to copy this installation to another server with the same configuration, same physical and virtual path, same db configuration, etc. The thing is, in my new server I get the homepage to work, but not the inner pages, so I guess has something to do with rewrite (mod_rewrite is installed) (both .htaccess are the same). When I access http://localhost/myweb/content/mypage I get a 404 or a "Forbidden" if I uncomment this in httpd.conf (original httpd.conf does not have this entry): <Directory path/to/docs"> DirectoryIndex index.php index.html Options Indexes FollowSymLinks AllowOverride None Order allow,deny Allow from all </Directory> Any clue? Thank you

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• What type of security problems are mitigated by this .NET architecture?

  - by Jonno

  Given the following physical layout for a .NET web application: DB (sql server, windows) - No public route (no table access, only stored procs) Web Service DAL (iis, windows) - No public route (can be accessed by web server via port 80 and 443) Web Server (iis, windows) - Public route (only via port 80 and 443) What type(s) / examples of attack could be used to compromise the public web server but would be blocked by the Web Service DAL? i.e. can you think of concrete attack types that the DAL stops? Please note, I am interested only in the security aspect, not scaling / fault tolerance / performance / etc. In my mind if the web server has been compromised using an attack over port 80/443, then the same attack would work over port 80/443 to the Web Service DAL box.

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• Can not join comp to the domain... greyed out

  - by Logman

  I have an old WinXP Pro SP3 computer I need to join to the domain, simple right? not really. When I go to control panel - system - computer name and click on CHANGE ("rename this computer") everything is greyed out. I can not set it from workgroup to a domain. I am logged on locally as an admin. (Builtin account and one I created) I have checked local policy (gpedit.msc) on the comp, but it feels like a needle in the haystack. I could probably reload an image faster than trying to fix this...but I am curious so I post here to see if anyone knows of it/fix. I tried reseting the policy to defaults, but no luck: secedit /configure /cfg %windir%\repair\secsetup.inf /db secsetup.sdb /verbose EDIT:

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• innodb memory usage mysql

  - by Tiddo

  I have a small vps, with only 256mb of ram, with maximum burst up to 512mb. When I configure my vps without innodb, it only uses 130 mb of ram, so that is no problem for me. But when I turn on innodb, The memory usage grows to about 300-400 mb. Is it possible to run innodb such that I won't exceed the 256mb? preferably I don't want to use more than 100mb for innodb. I already came across some sites which said I could limit the memory usage, but if I limit it to only 100mb will the db run well enough? (compared to for example the MyISAM storage engine) If 100mb is to little memory for innodb, can you recommend me any other storage engine which supports transactions?

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• Options for transparent data encryption on SQL 2005 and 2008 DBs.

  - by Dan

  Recently, in Massachusetts a law was passed (rather silently) that data containing personally identifiable information, must be encrypted. PII is defined by the state, as containing the residents first and last name, in combination with either, A. SSN B. drivers license or ID card # C. Debit or CC # Due to the nature of the software we make, all of our clients use SQL as the backend. Typically servers will be running SQl2005 Standard or above, sometimes SQL 2008. Almost all client machines use SQL2005 Express. We use replication between client and server. Unfortunately, to get TDE you need to have SQL Enterprise on each machine, which is absolutely not an option. I'm looking for recommendations of products that will encrypt a DB. Right now, I'm not interested in whole disk encryption at all.

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• Advice on off-site backup of Hyper-V Failover Cluster

  - by Paul McCowat

  We are currently setting up a Server 2008 R2 which will be off-site over a leased line with VPN. At the main site is 2 x Hyper-V hosts in a failover cluster with PowerVault M3000i iSCSI SAN. We are using BackupAssist for local backups and each host backups up itself and it's guests nightly creating a 500GB backup each which is copied to a 2TB rotated NAS drive. Files and SQL DB's are also backed up / log shipped etc. Looking for the best way to backup the Hyper-V VM's and copy them off-site so that the OS's are only a month old and the data is a day old. The main backups are too large to transfer between backups so options discussed so far are: Take rotating individual backups of the VM's each day and copy over, Day 1 SQL VM, Day 2 Exchange VM etc, would require more storage. Look in to Hyper-V snapshots, however don't believe these are supported in clustering. 3rd party replication tools

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• How to Architect a system on AWS for scaling (with a MySQL back-end)

  - by Edan Maor

  I'm trying to understand how to architect an Amazon Web Services application. As I understand it, the whole point of using something like AWS is to make the eventual scaling easier, so I'm trying to understand how to do that. I have an instance, running off of EBS (EBS-based instance, not a regular instance). My application (a Django app) uses MySQL as a back-end. So the question is, where am I supposed to install the MySQL? Do I install it on the same instance? In which case, as far as I can tell, I can't simply create more server instances from that image. Or am I supposed to simply spin up another server as a DB server, and run off of that? Thanks for any help!

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• SQL server availability issue: large query stops other connections from connecting

  - by Carlos

  I've got a high-spec (multicore, RAID) server running MS SQL 2008, with several databases on it. I have a low throughput process that periodically needs a small amount of information from one of the DBs, and the code seems to work fine. However, sometimes when one of my colleagues does a huge query against one of the other DBs, I see full CPU usage on the machine, and connections from my app time out. Why does this happen? I would have thought the many cores and harddisks would somehow (together with cleverly written DB server) be able to keep at least some of the resources free for other apps? I'm pretty sure he doesn't use multiple connections for his query. What can I do to prevent this?

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• MariaDB, Galera, xtrabackup - do I need the binary log?

  - by bernhardrusch

  We are using a MariaDB Galera Cluster with 3 nodes. For the state transfer we are using xtrabackup. We have some problems with the binary logs - they got too big and crashed the server. We can remove them manually with the purge binary logs command, another way would be to set the expire_logs_days so they would expire. I now that we could use xtrabackup to backup the DB and use the binlog to get to some point in time. But do we really need it for Galera to work ?

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• There is a problem with the Office database

  - by RomanT

  After a TimeMachine restore; office 2011 is having kittens over permissions it would seem. Having attempted a 'repair' out of Disk Utility, am still seeing: 'there is a problem with the Office database' upon startup. After which Word/Excel work without issues. Outlook on the other hand won't even start. Given the obvious message here "You do not have write access to the Outlook application folder" - where is the DB located to check?! Ideas ? Thank you

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• Restore Picasa people tags

  - by Paul

  I have loaded Windows 7 to my laptop. Before doing this I backed up all my pictures using the Picasa backup utility. I then ran a restore on the clean Windows 7 install. I then installed Picasa 3.5 and none of the people tags showed up. I then went and deleted what I thought was the Picasa DB and then tried running the restore again. Now each folder shows up twice in Picasa but only once under the Windows Pictures folder. How do I get rid of the duplicates in Picasa and get my people tags back?

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• Can I use my Belkin router as a repeater?

  - by Kyle R

  I've got a brand new, unopened Belkin N600 DB router (yay 50% off sale), and I can't seem to figure out if I can use it as a repeater. As far as I can tell, it doesn't support DD-WRT or Tomato, but I'm wondering if there may be some way to rig it up to repeat Wifi. Also, I really need to know before I open it, because, being a bit tight on money at the moment, I'll probably sell it if I can't use it as a repeater. Finally, two caveats: I can't use the other wireless router for anything other than broadcasting straight from the modem (parents are paranoid about anything technological). I can't run ethernet to the second router due to the layout of the house. Thanks so much for the help everyone--if I'm being vague, tell me! EDIT: Also, the manual here is pretty useless on this topic as far as I can tell.

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• Fixing Broken Groups

  - by themaestro

  Hey, I just got onto a new project with the student government at my University and we're trying to get our webserver into a more workable state. The current problem is that all of us for some reason have sudo power on the server, but we can't write/create files anywhere on the server (as far as we can tell) currently. Our groups are currently as follows: /srv/ice/db$ groups goshri sshamim rmenezes goshri : goshri sshamim : sshamim ptx rmenezes : rmenezes ptx daifotis : daifotis ptx We added a few of us to ptx because we thought that might give us write access but it didn't. We have a bunch of webapps running on this server but since it's university things change hands quickly. What can we do to give us read access?

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• How to choose NoSQL database engine?

  - by Poma

  We have a database with following specs: 30k records, 7mb in size 20 inserts/second 1000 updates/second 1000 range selects/second, by secondary index, approx 10 rows each needs at least one secondary index needs some mechanism to expire keys if they are not updated for 75 secs (can be done via programmatic garbage collector but will require additional 'last_update' index and will add some load) consistency is not required durability is not required db should be stored in memory For now we use Redis, but it does not have secondary index and it's keys index:foo:* is too slow. Membase also does not have secondary index (as far as I know). MongoDB and MySQL memory engine have table-level locks. What engine will fit our use case?

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• Bind dns server in Solaris 10 and win xp clients

  - by stevecomptech

  Hi, Added this in zone db file, i am running solaris 10 _ldap._tcp.mydomain.com. SRV 0 0 389 dc.mydomain.com. _kerberos._tcp.mydomain.com. SRV 0 0 88 dc.mydomain.com. _ldap._tcp.dc._msdcs.mydomain.com. SRV 0 0 389 dc.mydomain.com. _kerberos._tcp.dc._msdcs.mydomain.com. SRV 0 0 88 host.mydomain.com. Now i get this error when i try to join win xp to the domain The query was for the SRV record for _ldap._tcp.dc._msdcs.mydomain.com The following domain controllers were identified by the query: host.mydomain.com Common causes of this error include: Host (A) records that map the name of the domain controller to its IP addresses are missing or contain incorrect addresses. Domain controllers registered in DNS are not connected to the network or are not running. What do i need to change in order my win xp join the domain

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• What could cause a file system to spontaneously unmount or become invalid for a short time?

  - by Ichorus

  We've got DB2 LUW running on a RHEL box. We had a crash of DB2 and IBM came back and said that a file that DB2 was trying to access (through open64()) unmounted or became invalid. We have done nothing but restart the database and things seem to be running fine. Also, the file in question looks perfectly normal now: $ cd /db/log/TEAMS/tmsinst/NODE0000/TEAMS/T0000000/ $ ls -l total 557604 -rw------- 1 tmsinst tmsinst 570425344 Jan 14 10:24 C0000000.CAT $ file C0000000.CAT C0000000.CAT: data $ lsattr C0000000.CAT ------------- C0000000.CAT $ ls -l total 557604 -rw------- 1 tmsinst tmsinst 570425344 Jan 14 10:24 C0000000.CAT With those facts in hand (please correct me if I am mis-interpreting the data at hand) what could cause a file system to 'spontaneously unmount or become invalid for a short time'? What should my next step be? This is on Dell hardware and we ran their diagnostic tools against the hardware and it came back clean.

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• TS connection lost but not local

  - by Owl

  I have an office that is connected to a shared db server and terminal services server, that other offices use as well, through a vpn tunnel. For some reason all workstations in the office will lose connectivity to the remote address but will remain connected to their local internet. I have checked both firewalls to ensure all settings match accordingly. They seem to go down at routine times every day and it doesn't last longer than a minute or two. Any ideas of what this may be? OS: Windows Server 2003R2 Terminal Services 5.2 Symantec Gateway 320 & Symantec Firewall/VPN 100

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