Right, I don't want to use CacheMode.LOCAL because it's deprecated. Thus
my question, what will be the alternative for a purely local cache in
memory that doesn't cause the cluster-wide lock and no map exchange event?
On 29.09.22 14:57, Николай Ижиков wrote:
You may not want to use LOCAL caches because they are removed in
master [1] and will not exists in next release
[1]
https://github.com/apache/ignite/commit/01a7d075a5f48016511f6a754538201f12aff4f7
29 сент. 2022 г., в 15:55, Николай Ижиков <[email protected]>
написал(а):
Because node local cache created on each server node.
29 сент. 2022 г., в 15:43, Kramer <[email protected]> написал(а):
Coming back to my original question:
CacheConfiguration<UUID, BinaryObject> cfg = new CacheConfiguration<>();
cfg.setCacheMode(CacheMode.REPLICATED);
cfg.setAffinity(new LocalAffinityFunction());
Will the above code still create a cluster wide lock with partition
map exchange event even though the cache will be hosted on local
node only?
*Gesendet:* Dienstag, 27. September 2022 um 18:50 Uhr
*Von:* "Thomas Kramer" <[email protected]>
*An:* [email protected]
*Betreff:* Re: Creating local cache without cluster-wide lock
I'm using CacheBasedDataset to filter a subset from a distributed cache
of all training data for Linear Regression. This seems to by default use
the AffinityFunction from the upstream cache to create a new temporary
cache with every preprocessing trainer and on every dataset update. This
causes a lot of additional traffic if happening on multiple nodes.
So I was looking to create local caches for the filtered datasets.
On 27.09.22 18:30, Stephen Darlington wrote:
> What are you trying to do? The general solution is to create a
long-lived cache and have a run-number or similar as part of the key.
>
>> On 27 Sep 2022, at 15:36, Thomas Kramer <[email protected]> wrote:
>>
>> I understand creating a new cache dynamically requires a cluster-wide
>> lock with partition map exchange event to create the cache on all
nodes.
>> This is unnecessary traffic when only working with local caches.
>>
>> For local-only caches I assume this wouldn't happen. But
CacheMode.LOCAL
>> is deprecated.
>>
>> Is there a way to create a local cache without triggering unnecessary
>> map exchange events?
>>
>> Would this work or does it still create a short global lock on
all nodes
>> not only the local node?
>>
>> CacheConfiguration<UUID, BinaryObject> cfg = new
>> CacheConfiguration<>();
>> cfg.setCacheMode(CacheMode.REPLICATED);
>> cfg.setAffinity(new LocalAffinityFunction());
>>
