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Il 28/feb/2014 14:16 "Shishya" <[email protected]> ha scritto:
> Hi Luca,
>
> How to to locking Console run Javascript batch scripts.
>
> Regards
>
>
> On Saturday, September 21, 2013 7:14:47 PM UTC+5:30, Lvc@ wrote:
>>
>> Hi all,
>> I've just updated the Performance-Tuning wiki page with a tip to improve
>> the cases as the email object.
>>
>> High concurrent updates
>>
>> OrientDB has an optimistic concurrency control system, but on very high
>> concurrent updates on the few records it could be more efficient locking
>> records to avoid retries. You could synchronize the access by yourself or
>> by using the storage API. Note that this works only with non-remote
>> databases.
>>
>> ((OStorageEmbedded)db.getStorage()).acquireWriteLock(final ORID
>> iRid)((OStorageEmbedded)db.getStorage()).acquireSharedLock(final ORID
>> iRid)((OStorageEmbedded)db.getStorage()).releaseWriteLock(final ORID
>> iRid)((OStorageEmbedded)db.getStorage()).releaseSharedLock(final ORID iRid)
>>
>> Example of usage. Writer threads:
>>
>> try{
>> ((OStorageEmbedded)db.getStorage()).acquireWriteLock(record.getIdentity());
>>
>> // DO SOMETHING} finally {
>>
>> ((OStorageEmbedded)db.getStorage()).releaseWriteLock(record.getIdentity());}
>>
>> Reader threads:
>>
>> try{
>>
>> ((OStorageEmbedded)db.getStorage()).acquireSharedLock(record.getIdentity());
>> // DO SOMETHING
>> } finally {
>>
>> ((OStorageEmbedded)db.getStorage()).releaseSharedLock(record.getIdentity());}
>>
>>
>> <https://github.com/orientechnologies/orientdb/wiki/Performance-Tuning#file-system-access-strategy>
>>
>> For more information: https://github.com/orientechnologies/orientdb/
>> wiki/Performance-Tuning#high-concurrency
>>
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