On Wed, Aug 7, 2013 at 12:10 PM, Afkham Azeez <az...@wso2.com> wrote:
> > > > On Wed, Aug 7, 2013 at 12:00 PM, Dhanuka Ranasinghe <dhan...@wso2.com>wrote: > >> >> >> *Dhanuka Ranasinghe* >> >> Senior Software Engineer >> WSO2 Inc. ; http://wso2.com >> lean . enterprise . middleware >> >> phone : +94 715381915 >> >> >> On Wed, Aug 7, 2013 at 11:31 AM, Afkham Azeez <az...@wso2.com> wrote: >> >>> While running certain scenarios during testing of the Carbon 4.2.0 >>> packs, we saw certain performance issues when distributed Hazelcast >>> HashMaps are used as the backing data structure. To overcome this, I have >>> introduced the concept of an L1 local cache. It is a write through cache, >>> where items stored in it will also get written to the distributed data >>> structure. When there is a L1 cache miss, we will check in the L2 >>> distributed cache to see whether the value is there. >>> >> >> Is this L1 concept similar to first level caching in Hibernate? which >> means first level caching stores in memory, and flush them to second level >> caching (file system) later. >> > > No it is not exactly the same. The flushing here is done immediately. I > didn't want to complicate it until it becomes necessary. > So at the moment, cache write could be a bit slow, but reads are very fast. Reads are more frequent than writes > > >> >>> I am seeing significant performance improvement in the tenant creation >>> scenario after this improvement. >>> >>> -- >>> *Afkham Azeez* >>> Director of Architecture; WSO2, Inc.; http://wso2.com >>> Member; Apache Software Foundation; http://www.apache.org/ >>> * <http://www.apache.org/>** >>> email: **az...@wso2.com* <az...@wso2.com>* cell: +94 77 3320919 >>> blog: **http://blog.afkham.org* <http://blog.afkham.org>* >>> twitter: **http://twitter.com/afkham_azeez*<http://twitter.com/afkham_azeez> >>> * >>> linked-in: **http://lk.linkedin.com/in/afkhamazeez* >>> * >>> * >>> *Lean . Enterprise . Middleware* >>> >>> _______________________________________________ >>> Architecture mailing list >>> architect...@wso2.org >>> https://mail.wso2.org/cgi-bin/mailman/listinfo/architecture >>> >>> >> >> _______________________________________________ >> Architecture mailing list >> architect...@wso2.org >> https://mail.wso2.org/cgi-bin/mailman/listinfo/architecture >> >> > > > -- > *Afkham Azeez* > Director of Architecture; WSO2, Inc.; http://wso2.com > Member; Apache Software Foundation; http://www.apache.org/ > * <http://www.apache.org/>** > email: **az...@wso2.com* <az...@wso2.com>* cell: +94 77 3320919 > blog: **http://blog.afkham.org* <http://blog.afkham.org>* > twitter: **http://twitter.com/afkham_azeez*<http://twitter.com/afkham_azeez> > * > linked-in: **http://lk.linkedin.com/in/afkhamazeez* > * > * > *Lean . Enterprise . Middleware* > -- *Afkham Azeez* Director of Architecture; WSO2, Inc.; http://wso2.com Member; Apache Software Foundation; http://www.apache.org/ * <http://www.apache.org/>** email: **az...@wso2.com* <az...@wso2.com>* cell: +94 77 3320919 blog: **http://blog.afkham.org* <http://blog.afkham.org>* twitter: **http://twitter.com/afkham_azeez*<http://twitter.com/afkham_azeez> * linked-in: **http://lk.linkedin.com/in/afkhamazeez* * * *Lean . Enterprise . Middleware*
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