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Posted to jcs-users@jakarta.apache.org by Matheswaran Nachimuthu <ma...@infosys.com> on 2010/11/11 10:52:50 UTC
Key not getting cached
Hi,
I am using JCS 1.3 with the auxillary indexed disk cache. The data is
getting stored but the key is getting stored to the disk only while shutting
my tomcat. I have a problem if my tomcat crashes, the key is lost and not
getting updated to the key's file in the disk. Is it possible to write the
key as we write the data into the cache in JCS? Please help
Regards,
Matheswaran N
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Re: Key not getting cached
Posted by Matheswaran Nachimuthu <ma...@infosys.com>.
Thanks for your reply jorge
We provide the auxillary devices so it should save the data and key to the
auxillary device but the problem was the key was getting saved only during
normal shutdown so i moved to the blockDiskCache where i have an option
jcs.auxiliary.blockDiskCache.attributes.KeyPersistenceIntervalSeconds=600 so
that they key will get saved for each and every 600 seconds. This is how i
made sure that lossing the key is minimized.
Regards,
Matheswaran N
Jorge Medina-5 wrote:
>
> I think I have heard this problem before in the forum.
>
> If I remember correctly, the answer is that JCS is a cache, not a
> database. Do not expect the ACID properties of a database to be
> provided by the cache.
> You should not expect it to survive a crash, your application should
> just start building the cache again as requests are served.
>
> Some threads you may find useful:
>
> http://markmail.org/search/?q=JCS+key+persistence+list%3Aorg.apache.jakarta.jcs-users#query:JCS%20key%20persistence%20list%3Aorg.apache.jakarta.jcs-users+page:1+mid:wpljkuc7kwbgn3hr+state:results
>
> http://markmail.org/search/?q=JCS+key+persistence+list%3Aorg.apache.jakarta.jcs-users#query:JCS%20key%20persistence%20list%3Aorg.apache.jakarta.jcs-users+page:1+mid:tq4vkzfiebh2ak2u+state:results
>
>
> -Jorge
>
> On Thu, Nov 11, 2010 at 4:52 AM, Matheswaran Nachimuthu
> <ma...@infosys.com> wrote:
>>
>> Hi,
>>
>> I am using JCS 1.3 with the auxillary indexed disk cache. The data is
>> getting stored but the key is getting stored to the disk only while
>> shutting
>> my tomcat. I have a problem if my tomcat crashes, the key is lost and not
>> getting updated to the key's file in the disk. Is it possible to write
>> the
>> key as we write the data into the cache in JCS? Please help
>>
>> Regards,
>> Matheswaran N
>> --
>> View this message in context:
>> http://old.nabble.com/Key-not-getting-cached-tp30188546p30188546.html
>> Sent from the JCS - Users mailing list archive at Nabble.com.
>>
>
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Re: Key not getting cached
Posted by Jorge Medina <ce...@gmail.com>.
I think I have heard this problem before in the forum.
If I remember correctly, the answer is that JCS is a cache, not a
database. Do not expect the ACID properties of a database to be
provided by the cache.
You should not expect it to survive a crash, your application should
just start building the cache again as requests are served.
Some threads you may find useful:
http://markmail.org/search/?q=JCS+key+persistence+list%3Aorg.apache.jakarta.jcs-users#query:JCS%20key%20persistence%20list%3Aorg.apache.jakarta.jcs-users+page:1+mid:wpljkuc7kwbgn3hr+state:results
http://markmail.org/search/?q=JCS+key+persistence+list%3Aorg.apache.jakarta.jcs-users#query:JCS%20key%20persistence%20list%3Aorg.apache.jakarta.jcs-users+page:1+mid:tq4vkzfiebh2ak2u+state:results
-Jorge
On Thu, Nov 11, 2010 at 4:52 AM, Matheswaran Nachimuthu
<ma...@infosys.com> wrote:
>
> Hi,
>
> I am using JCS 1.3 with the auxillary indexed disk cache. The data is
> getting stored but the key is getting stored to the disk only while shutting
> my tomcat. I have a problem if my tomcat crashes, the key is lost and not
> getting updated to the key's file in the disk. Is it possible to write the
> key as we write the data into the cache in JCS? Please help
>
> Regards,
> Matheswaran N
> --
> View this message in context: http://old.nabble.com/Key-not-getting-cached-tp30188546p30188546.html
> Sent from the JCS - Users mailing list archive at Nabble.com.
>
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