[infinispan-dev] rethinking ISPN transactions

[Mark Little]

Yes, I understand that. My point is that in some environments where async commit is possible they also (opaquely) tie in the read requests to data such that they can block if the commit hasn't completed.

Mark.


On 4 Dec 2013, at 11:24, Mircea Markus wrote:

> Even if it doesn't fail: the commit is sent async, the get which is sync might be processed before the commit and sees the old data.
> 
> 
> On Dec 4, 2013, at 11:09 AM, Mark Little <mlittle at redhat.com> wrote:
> 
>> Agreed if fail. Alternatively it could block whilst waiting for the commit to complete.
>> 
>> Mark.
>> 
>> 
>> On 3 Dec 2013, at 13:58, Mircea Markus wrote:
>> 
>>>> Data cannot be read until the transaction has completed (one way or another). So I'm not sure what the problem is you're alluding to here.
>>> 
>>> 
>>> store.put(k,v1); //initial value
>>> tm.begin()
>>> store.put(k,v2);
>>> tm.commit();
>>> 
>>> assert store.get(k).equals(v2); //this might fail with async commits, which for some users would be surprising
>> 
>> ---
>> Mark Little
>> mlittle at redhat.com
>> 
>> JBoss, by Red Hat
>> Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom.
>> Registered in UK and Wales under Company Registration No. 3798903 Directors: Michael Cunningham (USA), Charlie Peters (USA), Matt Parsons (USA) and Brendan Lane (Ireland).
>> 
>> 
>> 
>> 
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> 
> Cheers,
> -- 
> Mircea Markus
> Infinispan lead (www.infinispan.org)
> 
> 
> 
> 
> 
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---
Mark Little
mlittle at redhat.com

JBoss, by Red Hat
Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom.
Registered in UK and Wales under Company Registration No. 3798903 Directors: Michael Cunningham (USA), Charlie Peters (USA), Matt Parsons (USA) and Brendan Lane (Ireland).