Hi Vinay,
Please see my answers inline
On 1/9/2016 9:22 PM, vinshar wrote:
How can i specify a off heap disc location for a cache? What is default?
If you mean a swap location where data is evicted from RAM then you can
override a default swapping location this way
// Configure swap spi changing location.
FileSwapSpaceSpi spi = new FileSwapSpaceSpi();
spi.setBaseDirectory("/some/path/for/swapping");
// Set the spi in IgniteConfiguration
IgniteConfiguration cfg = new IgniteConfiguration();
cfg.setSwapSpaceSpi(spi);
//Start the node.
Ignition.start(cfg);
By default the same SPI is used with the swap location at
'IGNITE_HOME/work/swapspace'.
On the other hand if under the off heap disc location you mean a
persistent storage then I would suggest reading this article
https://apacheignite.readme.io/docs/persistent-store
As per performance tips, enabling swap storage hurts performance. Why? isn't
that suppose to improve performance by keeping recently accessed entry in
memory and avoiding File I/O or random memory read for subsequent gets for
the same cache object?
The tip means that the performance will suffer if you get objects that
are already evicted to a swap storage. If the objects were in RAM
reading would be much faster.
Regards,
Denis
--
View this message in context:
http://apache-ignite-users.70518.x6.nabble.com/Off-heap-disc-location-tp2465.html
Sent from the Apache Ignite Users mailing list archive at Nabble.com.
