Hi all
I have a raid 5 NT server 4.0 with SQL 6.5 running.
I perform backups on tranlogs every hour and db`s every night.
I also have another 16G Nt server not raid 5.
Can someone tell me if it is possible to mirror a device or a database
into the regular 16G NT server from raid 5 server?
HOW???
HOw about database mirroring??
And also whats the best solution when it comes to mirrorring in NT server?
I need to start mirroring the databases without witness server.
View 3 Replies View RelatedI have been looking into mirroring a large amount of small databases approx 150 databases.
As I understand this won't be feasible because of the way mirroring threading works, http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=441900&SiteID=1
As I understand it for every database being mirrored sql will ping the mirror second, causing a network bottleneck?.
Also that the amount of threads generated for each mirrored database will cause also cause a bottleneck?
At the moment our database servers are under very little pressure and as an estimate use about 10% of the resources allocated to them such as CPU utilization, memory, disk IO and network. Our server hardware is Dual Quad core Xeons with 4 - 8 gig of memory and variety of 10k SCSCI raid configurations from raid 5 or 1,0 and sql 2005 32bit.
Ive done some calculations on the log file generation rate compared to network bandwidth there is more than enough network bandwidth.
Has anybody had any luck in mirroring many small databases?
My concerns is how much traffic is caused by the pinging of the mirror for each database?,
How many threads will the mirroring cause and what is the max amount of threads sql can handle?
How much memory will be consumed by each one of these mirroring threads?
I have two databases db_A_primary and db_B_primary, both databases are on one Primary server.
db_B_primary has a View into db_A_primary.
Scenario: db_A_primary goes down and failsover to db_A_mirror on the Mirror server.
In this scenario when the View in db_B_primary is accessed will it automatically be redirected to look at the db_A_mirror database on the Mirror server?
Barry.
Can someone explain what does this mean? This is from http://www.microsoft.com/technet/prodtechnol/sql/2005/dbmirror.mspx
<quote>However, all these techniques for coordinating client redirection with a database mirroring have an important limitation. Database mirroring occurs only at the database level, not the server level. Be careful if your application relies on querying several databases on a server, or uses multi-part object names to query across several databases. When several databases reside on one server, and they are mirrored to a standby server, it is possible that one of several databases might fail over to the standby but the others remain on the original server. In that case, you might need one connection per database that you are querying, so that you do not attempt cross-database queries on a standby server where only one database is a principal and the remaining are mirrors.</quote>
Also I read somewhere that if one mirrored DB fails, all other mirrored DB should also be transferred to the mirror.
For example: Let's say Srv1 (principle) and Srv2 (mirror) and Srv3(witness) are SQL servers with only default instances. The SQL instance has 4 DBs (DB1, DB2, DB3, DB4) and all of them are mirrored to Srv2.
An ASP.NET application has four seperate connection strings like:
objConn1 --> Data Source=Srv1;Failover Partner=Srv2;Initial Catalog=DB1;Integrated Security=True;
objConn1.connect();
objConn2 --> Data Source=Srv1;Failover Partner=Srv2;Initial Catalog=DB2;Integrated Security=True;
objConn2.connect();
objConn3 --> Data Source=Srv1;Failover Partner=Srv2;Initial Catalog=DB3;Integrated Security=True;
objConn3.connect();
objConn4 --> Data Source=Srv1;Failover Partner=Srv2;Initial Catalog=DB4;Integrated Security=True;
objConn4.connect();
If DB2 failsover to Srv2 (mirror), why should all other DBs be failedover?
Thanks
I have to mirror 3 DBs on my sql server instance . I have restored there full backups and log backups on mirror.I have also created endpoints on principal and mirror using default ports 5022 and 5023.
know if i can use the same endpoint for the databases on principal instance ?
With the Synonym, I was encouraged to separate my db to several smaller dbs, like base,dynamic,static and security. Now I am trying to use mirroring, I see it may cause problem, I think I need mirror all them to another server. My question is when the server is down, will all db switch to mirror server in the same time? And one can manually set which db is the principal db, but in my case, it will not work if principal server of all four dbs are not the same.
Any thought?
thanks
I am trying to enable database mirroring for 100 database.
It goes error free till 59 databases (some times 60 databases) with the
status (principal, synchronized) on principal. on the 60th or 61st database
it gave the status (principal, disconnected). Also mirror starts acting
abnormal. connection to mirror starts to give connection timeout and it is
not enabling database mirroring on any more databases. I have SQL SERVER
2005 Enterprise with SP1 on the servers. witness is not included yet.
this are my test servers... i have more than 500 databases on my production
servers.
principal and mirror both are using port 5022 for ENDPOINT communication.
I am trying to enable database mirroring for 100 database.
It goes error free till 59 databases (some times 60 databases) with the
status (principal, synchronized) on principal. on the 60th or 61st database
it gave the status (principal, disconnected). Also mirror starts acting
abnormal. connection to mirror starts to give connection timeout and it is
not enabling database mirroring on any more databases. I have SQL SERVER
2005 Enterprise with SP1 on the servers. witness is not included yet.
these are my test servers... i have more than 500 databases on my production
servers.
principal and mirror both are using port 5022 for ENDPOINT communication.
All of the databases are critical and all must be included in the Database Mirroring.
so, after that I tried to implement database mirroring again......
System has 3 GB of RAM, SQL SERVER (Mirror) using 85 MB of RAM but still
giving this error while trying to enable database mirroring for 37th
Database.....
"There is insufficient system Memory to run this query"
WHY?
I have a 2 node cluster having 4 cores each wherein having 3 instances of SQL 2008 R2 enterprise comprising of 60 databases, 20 on each instance. I need to setup mirroring for each of the databases to a secondary server having 4 cores and 3 instances.
What i understand is that in this case the mirror server will be providing max of 512 worker threads and the 60 mirror databases would consume 240 threads.
What all needs to be checked for looking into the feasibility of going ahead with a async mirror setup as mentioned above.
I have a 2 node cluster having 4 cores each wherein having 3 instances of SQL 2008 R2 enterprise comprising of 60 databases, 20 on each instance. I need to setup mirroring for each of the databases to a secondary server having 4 cores and 3 instances. What i understand is that in this case the mirror server will be providing max of 512 worker threads and the 60 mirror databases would consume 240 threads.what all needs to be checked for looking into the feasabilty of going ahead with a async mirror setup as mentioned above.
View 0 Replies View Related
Server A = primary SQL DBs (mirroring origination)
Server B = failover SQL DBs (mirroring destination)
For database mirroring a witness is required.
Can the witness live in another instance of SQL on server B?
Does anyone out there use a NAS device to place there database and corresponding images on?
View 2 Replies View Relatedhi, I usually back up the database to a file within the sql server box. then use a tape backup to back up the whole directory of the sql server in the d: drive.
Is this right way to do or there is a better way ?
Ahmed
I know that you need to create a device in 6.5 to do backups, but in 7.0, it seems to take care of this for you. However, there is still a device folder in the Management folder of version 7.0's console tree. Why would it be better to back up to devices, rather than anywhere else on the hard drive. Is there any way to easily schedule the deletion of backups on these devices? I know that with 7.0's Maintenance plans, you can schedule old backups to be deleted. But how do you do that for devices?
joe
How do I create more than 10 devices in sql server 4.2?
View 2 Replies View RelatedHello
I just tried to make a typed resultset from a SSCE v3.5 database, and recieved this message from Visual Studio:
"Typed ResultSets cannot be generated for tables on Microsoft SQL Server Compact 3.5 databases present on devices."
On the device, speed and low memory consumption is important. So it seems to me that this should be present ONLY on devices, because on the desktop we can just use the DataSet generator and not care about the overhead.
Anyway, ripped from what would have been a nice feature, the alternatives that comes to mind are:
1. Making my own resultset generator
2. Use typed DataSets
3. Derive from SqlCeResultSet and store the Field names in it, to build my own typed resultset class.
Any suggestions on what to do?
I asked about this a few mos ago over in the CF forum, but I'm hoping there's a better solution someone (Erik?) knows about here.
Is there a "standard" deploy script for SQL Server CE on devices? There doesn't even seem to be one in the d/l from Microsoft. During development, Visual Studio handles the installation of SQL Server CE on the device but deploying it on a device that isn't partnered to a dev box seems to be a matter of "just copy the cab file over".
While I'm willing to do that if I have to, it raises some other questions. How do I know if it's already there? How do I know if what's there is a newer version or not (and if it is, how do I abort this step)? How do I make sure some other application hasn't installed it already? Do I really even need to worry this?
I can just have my installer tell ActiveSync to put it on the device, but without knowing the above I'm kind of nervous about it.
Hi All,,
I want to get a list of backup devices for a selected database
ex :
Northwind Database i need to get the list of back devices for this db
any one know how the query could be written
best regards
Wafi Mohtaseb
I have taken backups and the backup devices are stored in C: drive and now i want them to be moved onto the other drive.So how can i do it without creating new devices and scheduling them again.
Any help would be appreciated.
Thanks,
Kris
i need to initialise the backup devices as the the backup files have grown so big thats its occupy hard drive space , each device is for @ day for all databse we use , what do i do
thanks
safac
Hello
Does anyone have experience/advice with large databases (5-10 Gig)? If so, I was wondering about
performance/other benefits of spanning a large database across multiple devices (different disks). Would anyone
vote for or against doing this?
Suggestions...
Thanks
Tim
Hello All,
I want to know if it's possible for a database on multiple devices to put specific tables on specific devices?? and if this is possible how to do it??
Thanks for help
Mohamed hani
Hi guys
I am relatively new to SQL Server admin and I have been handed a task of creating backup devices for a particular SQL Server which has 204 databases.
Rather than go through and create Full, Incramental and Transaction Log backup devices for each database is ther anyway of doing the following
Create a script to go through and for each database name in 'sysdatabases'
create a folder e.g sqldataackup\%databasename%
and within each folder create a backup device called
%databasename%_full
%databasename%_inc
%databasename%_log
Also all these databases are running in 'Simple' recovery mode so obviously I need to change this to 'Full' to enable incramental and log backups - is this possible using the same script.
Hope someone can help as the thought of doing all of this individually for each database scares me silly!!! :)
Thanks in advance for any help
Hanley
Hi,
I am using EMS SQL Manager for SQL Server (www.sqlmanager.net). I am trying to learn how to do backups of my database.
I am up to this step -> http://www.sqlmanager.net/products/mssql/manager/documentation/hs21640.html
I don't think I actually understand what a device is, how it's created, where it resides, etc. I would like to backup my remote datasource to my local computer's harddrive.
Can someone please explain how this 'device' works and how I should set up?
Thank you so much for any help :-)
jo
Hi all,
Can somebody tell me how to display reports created in SSRS 2005 in PDA/mobile devices? How to connect to the PDA device?
I am new to SS7. We are planning to rearrange our system databases so that the logs are on one drive
and the data files are on a different drive. I found a really good white paper on this but just want to
verify that there is not a problem with doing this. In sybase there were some restrictions on doing this.
Any info you have would be appreciated.
Is there a way to shrink database devices in SQL Server 6.5 Other than dropping and restoring?
View 1 Replies View RelatedHello,
I am using EM to administer SQL 6.5 SP5a and have a few dBs that do not show backup history by expanding the backup device. The server is regestered as SA and MSDB does contain the the correct data in the sysbackuphistory table. MSDB DBCCs OK and other dBs show history. I manage multiple SQL 6.5 servers but this is the first time I've seen this and can find no info in the various KBs or NGs..
Anyone have any clues?
Thanks,
Jack
Hi am new to this, I am doing some asp development and wanted to know if there is a way of specifying the drive to place log and data devices through sql statments or stored procedures.
--Tito
If I'm not mistaken, we can create a backup device OR backup files in SQL7. Can someone tell me which one is better?
View 1 Replies View RelatedJust wondering - on a straight RAID 5 system is there any advantage, performance or otherwise, to splitting a SQL 6.5 database over multiple database devices? Or for simplicity's sake am I just further off creating a single device and manually extending it as the database grows?
Thanks
RM
Hello--
I am trying to backup a VLDB (800+gig) to multiple devices. I am using 4 disk drives. Assuming all devices have the same performance, should the 4 devices fill equally? (IE 200gig per drive) If so, what would might happen if one of the 4 drives only has 100 gig free with the other 3 having 300 gig free each?
Thanks for the help--
Jeff