Does it make sense to create a worker role for data access to DocumentDB?

Hi,
I'm building an ASP.NET MVC app that will run on Azure. I'm using DocumentDB as its back-end database.
Sometimes, I return multiple data sets from different collections that need to be "reorganized". I handle this using LINQ in my application code. Does it make sense then to put all my data access and manipulation code into a worker role that I
can call from my web application that will run as a web role?
The reason why I'm thinking this may be beneficial is that I could scale up my worker role to increase its data manipulation capacity.
On the other hand, in most cases, my web role has to wait for a response from the DAL before it can do anything -- meaning, I cannot handle data access asynchronously -- I'm wondering if worker role approach makes any sense. I think mostly, worker roles
are used for operations that can run asynchronously.
I'd appreciate your feedback on this.
Thanks, Sam

Hi,
Worker role applications are background processing applications like Windows processes which run in the background. Applications hosted within worker roles can run asynchronous, we usually use worker role to do some long-running or perpetual tasks, and
use scale function to load balance the tasks. Based on your description, it seems that worker role is a good choice for you, please try it, if you have further issues, welcome to create new threads in our forum.
Best Regards,
Jambor
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Does it make sense to create more than one repository of the same type?

Hi guys!
Does it make sense to create more than one repository of the same type? Let's say 2 CM repositories?
Thanx for answer!
Peter

Hi Peter,
yes, that makes sense. If you want to use different combinations of repository services you need different repositories. Or if you want to include existing data (e.g. file systems) from different locations. Or if you need to use different backup strategies (RDBMS, file), or ...
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Message was edited by:
Carsten Buechert

Does it makes sense to create an index on a column used for partitioning

I am new to using partitions along with index. Can someone help me with the situation below?
I have a table defined like below
CREATE TABLE FACT_MASTER
PERIODCODE NUMBER(8) NOT NULL,
PRODUCT_CD NUMBER(10) NOT NULL,
DPT_CD NUMBER(3),
FACT_VALUE1 NUMBER,
FACT_VALUE2 NUMBER,
FACT_VALUE3 NUMBER,
FACT_VALUE50 NUMBER
PARTITION BY RANGE (PERIODCODE)
partition P1 values less than (2002),
partition P2 values less than (2003),
partition P3 values less than (2004),
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In a select query on this table, period code and product code are being used. I am planning to create an index to boost the performance. Does it make sense to include the period code column also in the index? I am planning to create index only for the product code column. I am thinking that the partition itself will act like an index for periodcode. Can someone tell me if this is correct? I am using 10g.
Edited by: user6794035 on Jan 21, 2010 8:47 AM
Edited by: user6794035 on Jan 21, 2010 8:50 AM

In your scenario I think it's better not to create an index on PERIODCODE because this column probaly has a only few distinct values.
In other scenarios, when in the same partition there are many distinct values of the partitioning key, creating an index can be an advantage for query performances..
But it depends on the specific context...
Max
[My Italian Oracle blog|http://oracleitalia.wordpress.com/2010/01/17/supporto-di-xml-schema-in-oracle-xmldb/]

GW2012 move: Does it make sense to move users to a new PO?

Moving from GW8 on OES-NW to GW2012 on OES11: Does it make sense to create new post office and move users?
We have a medium size GroupWise 8 system with a single post office holding less than 600 user accounts, 128 resources and 77 distribution lists.
Due to politics we also have a non-GroupWise external domain that contains a non-GroupWise external post office with a large number of "users".
The post office is on the primary domain.
3 secondary domains hold a GWIA and two web access agents.
I've never been real clear where the external stuff exists...
One of the web access gateways resides on an OES11 server.
The other webaccess agent and the GWIA are on OES-NW servers.
All reside in NSS volumes.
Given the lack support for NSS volumes on Linux servers by most backup applications (including mine), I've pretty much determined that it makes sense to move my GW system to EXT3 volumes.
Even if I change backup software and stick with NSS, and even though all my data is stored on SAN arrays, from what I've read on the forums and from Danita's books, it's preferable to copy your GW system files to a new NSS volume, as opposed to just re-attaching the OES-NW LUN to the new OES11 server.
Point being, whatever I do will involve copying the entire system via dbcopy and at some point, will also involve shutting down the existing domain and PO for the last phase of the copying process.
So..., I'm contemplating the following scenario:
Create a new OES11 server with EXT3 volumes sufficient for holding my GroupWise system.
Create new GroupWise 8 domain on the server.
Promote the new domain to primary and upgrade this new domain to GroupWise 2012.
Once the new domain is upgraded, create new GW2012 post office on new server/primary domain and migrate the users, resources and distribution lists to the new post office.
In the past I've had an additional post office and had migrated a about 20-25 users to that post office.
It wasn't a terrible process, and fortunately, I didn't run into any problems with the migration of those users.
When I re-consolidated my system, moving them back was also problem free
On the pro side:
No downtime of entire system
Relatively simple
Any issues in the migration process would be user-specific and would not effect the entire system.
On the con side:
Process could take far longer, since you can't move a lot of users simultaneously.
In addition, we have a small group of users with anywhere from 40,000 to 80,000 email in their account, so I'd have to factor that into haw many users I migrate at one time.
The chance of running into a stalled migration, for whatever reason, is probably much higher than running into a problem with moving the domain and PO via dbcopy.
The unknown factors for me and my level of experience:
It's been a while since I've had multiple post offices, so I don't recall what changes the users might see with regard to distribution lists, web access or external email.

Originally Posted by gathagan
Moving from GW8 on OES-NW to GW2012 on OES11: Does it make sense to create new post office and move users?
Is there any reason you think that warrants to do so?
If the system is performing normally I'd opt to stick to upgrading the current setup as is.
I'm also curious, are you intending to upgrade to 2014 after the 2012 upgrade?
Originally Posted by gathagan
The post office is on the primary domain.
3 secondary domains hold a GWIA and two web access agents.
I've never been real clear where the external stuff exists...
Ok, that setup makes the upgrade easier. As you will start the upgrade with the primary holding the PO's... the PO's can be upgraded right after or during the domain upgrade (depending on if the MTA and POA are running on the same server).
That means you don't have to think about upgraded webaccess/GWIA connectivity issues with a lower PO version.
The external stuff are simply configurations found in the existing GroupWise domain databases. Or do you mean where those connected systems actually run?
Originally Posted by gathagan
One of the web access gateways resides on an OES11 server.
The other webaccess agent and the GWIA are on OES-NW servers.
All reside in NSS volumes.
And the primary Domain and PO are also still on NetWare (version 6.5 SP8 I presume), correct?
Originally Posted by gathagan
Given the lack support for NSS volumes on Linux servers by most backup applications (including mine), I've pretty much determined that it makes sense to move my GW system to EXT3 volumes.
Which backup application is that? With GroupWise op Linux not much NSS support is needed IMO.... as long as the files get backed up properly other metadata (rights, ownerships, etc) is irrelevant.
As for EXT3 vs NSS, when dealing with OES I always choose NSS. But that's me.
Another option could be to use XFS instead of ext3. That does perform much better, but has to be noted that it is more prone to file corruption in unexpected power loss situations.
With ext3, watch out for the scheduled filesystem check cycles at boot, that is one thing I really dislike about ext3 as disabling that check completely is not recommended and it means at least once a year the system will take an extensive amount of time to complete a (re)boot due to the check running on the ext3 filesystem. That usually pops up on you when you are not counting on it and "just quickly" want to reboot the server in a patching routine or other.
Originally Posted by gathagan
Even if I change backup software and stick with NSS, and even though all my data is stored on SAN arrays, from what I've read on the forums and from Danita's books, it's preferable to copy your GW system files to a new NSS volume, as opposed to just re-attaching the OES-NW LUN to the new OES11 server.
Yes, it's always good if you can start with a clean volume when transitioning from NetWare to OES.
Depending on how long you can afford to have the system down during upgrade, you can also choose the route of moving the NetWare LUN to the new OES server. Adding a second new LUN to the OES server with the needed size and initializing it with a new NSS volume and then just simply do a volume to volume copy using the cp of rsync command. As it's on the same server that can go quite quickly within an acceptable maintenance window to complete all move/upgrade steps.
Originally Posted by gathagan
Point being, whatever I do will involve copying the entire system via dbcopy and at some point, will also involve shutting down the existing domain and PO for the last phase of the copying process.
Sure, though you don't necessarily have to use dbcopy... depending on what you are planning to do. An offline copy won't require it for example.
How much data are we talking about (in GB's)?
Originally Posted by gathagan
So..., I'm contemplating the following scenario:
Create a new OES11 server with EXT3 volumes sufficient for holding my GroupWise system.
Create new GroupWise 8 domain on the server.
Promote the new domain to primary and upgrade this new domain to GroupWise 2012.
Once the new domain is upgraded, create new GW2012 post office on new server/primary domain and migrate the users, resources and distribution lists to the new post office.
If you really want to move users.... sure. I'd again opt for upgrading the existing system.
Also, it's a good rule to have the PO's running the same GroupWise version and patchlevel before commencing user moves. Moves between PO's with a different GroupWise version can lead to issues.
Originally Posted by gathagan
In the past I've had an additional post office and had migrated a about 20-25 users to that post office.
It wasn't a terrible process, and fortunately, I didn't run into any problems with the migration of those users.
When I re-consolidated my system, moving them back was also problem free
If you would want to move users, for whatever reason, I'd opt to first upgrade to the latest version first, then move. There have been many enhancements and bugfixes made in the move procedure over these last couple of years.
Originally Posted by gathagan
On the pro side:
No downtime of entire system
Relatively simple
Any issues in the migration process would be user-specific and would not effect the entire system.
On the con side:
Process could take far longer, since you can't move a lot of users simultaneously.
In addition, we have a small group of users with anywhere from 40,000 to 80,000 email in their account, so I'd have to factor that into haw many users I migrate at one time.
The chance of running into a stalled migration, for whatever reason, is probably much higher than running into a problem with moving the domain and PO via dbcopy.
I prefer a system upgrade over moving users. The process of moving when dealing with 100+ users, requires more effort and there are always things that need attention for a portion of the users. Also things like mobile devices can require some extra attention after having moved an account for example.
True, problems during a system upgrade can potentially affect all users. That is a factor. From the many upgrades I've done that's rarely really been an issue and problems encountered during an upgrade did not cause too much delay. Just make sure you always have a good full backup handy so you can reverse the upgrade if ever needed.
Originally Posted by gathagan
The unknown factors for me and my level of experience:
It's been a while since I've had multiple post offices, so I don't recall what changes the users might see with regard to distribution lists, web access or external email.
If by this you are referring to user moves and address book visibility between PO's, that should not be different to what users are seeing now. At least, the default is that within a GroupWise system all is visible throughout the system. If you have specifically set GroupWise objects to Postoffice visibility... then that would be something to check.
Cheers,
Willem

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I know one way to cut down on the initial backup time is to exclude some folders and files.
Which items does it make sense NOT to back up? For example, is it pointless to back up System files? Applications? Libraries?
If I somehow lost all files on my desktop's hard drive, what would be essential to have as backups on the Time Capsule?

Some other examples of large monolithic files that aren't great candidates to have Time Machine backup are:
Certain mail apps - not Apple Mail, but Eudora, Entourage, Thunderbird?? store mail in large mailbox files so every incoming, every delete, changes the entire mailbox and the whole thing gets backed up.
Certain photo apps. like Adobe Lightroom and IView maintain large catalog files that change every time you do anything - then the whole thing gets backed up. (I don't know about the inner workings of Aperture or iPhoto so I can;t comment on them)
You do want to back these things up, and while Time Machine will work with then, they chew up space very quickly. Probably better to make/update copies of these files periodically.
There is a valuable App - [Time Tracker|www.charlessoft/TimeTracker.zip].
It is useful, particularly when getting started, or anytime it looks like some backup is unusually large.
It will tell you for each backup exactly what was backed up and how much space was required for each drive, folders within drive, files within folders etc....
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I need to work on documents in both my iMac and air book. But I have to download document and them upload it, and when I upload it I can't open it unless I open it on my phone first. Yet changes made on phone appear straight away. Does this make sense????

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Currently my internal drive is full due to Aperture. I want to work with Aperture from a external drive verses my internal drive. In addition, I want to back-up my work to another external drive. Is this easily done? Does this make sense? Pros / Cons...

Currently my internal drive is out of space due to my Aperture files. I want to place Aperture on a external drive to work from verses in intnal drive. In addition, I want to back-up all my work to another external for safe keeping. Once I move aperture to the external, I want to delete it off my internal drive. Does this make sense to do? Pros / Cons....

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The best approach is probably to keep the applications (iPhoto, Aperture etc.) where they are now, but move the files (photos, music, videos etc.) to the external drive.
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Hello everybody,
I have updated from Snow Leopard to Lion over the App Store and now my iMac (the 27" one from last year) seems to suffer from several slowdowns. Quite unusual for a new Mac. So I decided to try a clean install. Of course I would like to keep my data, my programs and stuff. I am doing daily backups with my Time Machine, so this should not be a problem.
But thats my question: Does it make sense to put back all data from the Time Machine from a backup on a clean install? Doesn`t it possibly put back all the old problems with all the slowdowns I experience right now?
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greetings
Michael

the_whispering wrote:
So I decided to try a clean install.
I'd recommend against starting with the "nuclear" option.
First, is there a "pattern"? Does the problem seem to coincide with any particular app(s)?
How full is your internal HD? If it's over about 85%, that can contribute to slowness.
Check for directory damage, by Verifying your internal HD, per #6 in Using Disk Utility.
Check for unusual log messages that can indicate a problem. See the tan box in OSX Log Files to locate your system.log, then the blue box there to decipher it, especially the Other Problems section.
If you suspect a problem with your installation of OSX, download and install the "combo" update, per Installing the"combo" update and/or Reinstalling OSX.
If that doesn't help, try installing a fresh version of OSX (that won't disturb anything else), per the same article.
The following I intend to do:
- backup all data with Time Machine
- create a Lion install disc
- boot from the disc, delete the HDD
- install Lion from the disc
- boot the new OS and put back the Time Machine backup
If you want to restore everything from your Time Machine backup, all you have to do is start up from your Recovery HD and do the restore. That will erase the HD and copy everything, including OSX, from the backups. Thus, it's unlikely to help, unless you had unrepaired directory problems.
Or, after you install Lion, use Setup Assistant to transfer everything except OSX from your backups. See Using Setup Assistant on Lion. Functionally, that's pretty close to just installing a fresh copy of Lion as above.

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hey
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An error occurred at line: 16 in the jsp file: /_status.jsp
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symbol : method getString (java.lang.String)
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When I updated my Macbook to LIon, I seemed to have lost apps on my iPhone. Does that make sense?

just re-download them.

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HI Guys
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Hi,
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VS2010
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Does it make sense to create a worker role for data access to DocumentDB?

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