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From Denis Magda <dma...@apache.org>
Subject Re: question: How data are stored in IgniteCache?
Date Sun, 16 Apr 2017 15:29:12 GMT
1. When you transfer an object over the wire or put it into a persistent store (withKeepBinary
property enabled) then only the byte array is used.
2. No

—
Denis

> On Apr 15, 2017, at 1:51 PM, Vyacheslav Daradur <daradurvs@gmail.com> wrote:
> 
>>> If we use a cache which is configured to use binary mashaller:
>>> 1. In which cases a placed in the cache object (serialized object) won't
> be wrapped?
>>> 2. In which cases a placed in the cache object won't be serialized (to
> byte array) and will be stored as is?
> 
> I meant: Are there any cases of described (1,2) situations.
> If yes, which cases?
> 
> 2017-04-15 23:44 GMT+03:00 Vyacheslav Daradur <daradurvs@gmail.com>:
> 
>> If we use a cache which is configured to use binary mashaller:
>> 1. In which cases a placed in the cache object (serialized object) won't
>> be wrapped?
>> 2. In which cases a placed in the cache object won't be serialized (to
>> byte array) and will be stored as is?
>> 
>> 2017-04-14 20:03 GMT+03:00 Denis Magda <dmagda@apache.org>:
>> 
>>> If a serialized object is stored in an on-heap cache then it will be
>>> wrapped by BinaryObjectImp but if it’s an off-heap cache then
>>> BinaryObjectOffHeapImpl is used instead.
>>> 
>>> —
>>> Denis
>>> 
>>>> On Apr 14, 2017, at 12:32 AM, Vyacheslav Daradur <daradurvs@gmail.com>
>>> wrote:
>>>> 
>>>>>> when it’s stored in memory in a specific cache partition
>>>> Does that mean that any serialized object is always stored IN MEMORY as
>>> is
>>>> wrapped by BinaryObjectImpl?
>>>> 
>>>> 
>>>> 
>>>> 2017-04-14 3:42 GMT+03:00 Denis Magda <dmagda@apache.org>:
>>>> 
>>>>> A serialized object is always wrapped by BinaryObjectImpl when it’s
>>> stored
>>>>> in memory in a specific cache partition or you access it from your
>>>>> application in a form of BinaryObject. However, when you transfer the
>>>>> object over the wire or put it into a persistent store (withKeepBinary
>>>>> property enabled) then only the byte array is used.
>>>>> 
>>>>> —
>>>>> Denis
>>>>> 
>>>>>> On Apr 13, 2017, at 12:21 AM, Vyacheslav Daradur <daradurvs@gmail.com
>>>> 
>>>>> wrote:
>>>>>> 
>>>>>> Denis, thank you for answers.
>>>>>> 
>>>>>> I meant another.
>>>>>> 
>>>>>> For example:
>>>>>> Cache queries use a BinaryObjectImpl and a withKeepBinary-mode use
>>> it, so
>>>>>> looks like all actions on serialized object are make via a
>>>>> BinaryObjectImpl.
>>>>>> 
>>>>>> Does a serialized object always is stored as BinaryObjectImpl or
it
>>> will
>>>>> be
>>>>>> wrapped on demand?
>>>>>> 
>>>>>> 2017-04-12 22:34 GMT+03:00 Denis Magda <dmagda@apache.org>:
>>>>>> 
>>>>>>> A Java wrapper around an actual binary byte array with some
>>> additional
>>>>>>> fields and methods to work with the serialized data.
>>>>>>> 
>>>>>>> —
>>>>>>> Denis
>>>>>>> 
>>>>>>>> On Apr 12, 2017, at 8:33 AM, Vyacheslav Daradur <
>>> daradurvs@gmail.com>
>>>>>>> wrote:
>>>>>>>> 
>>>>>>>> In what cases BinaryObjecImpl is used?
>>>>>>>> 
>>>>>>>> 2017-04-12 18:08 GMT+03:00 Denis Magda <dmagda@apache.org>:
>>>>>>>> 
>>>>>>>>> Hi,
>>>>>>>>> 
>>>>>>>>> A cache entry is always stored in a binary format (byte
array) in a
>>>>>>> cache.
>>>>>>>>> Even when you transfer an entry from one node to another,
as a
>>> result
>>>>> of
>>>>>>>>> cache.put(…), operation the entry will be serialized
into the
>>> binary
>>>>>>> format
>>>>>>>>> and transferred over the wire.
>>>>>>>>> 
>>>>>>>>> —
>>>>>>>>> Denis
>>>>>>>>> 
>>>>>>>>>> On Apr 12, 2017, at 1:11 AM, Vyacheslav Daradur <
>>> daradurvs@gmail.com
>>>>>> 
>>>>>>>>> wrote:
>>>>>>>>>> 
>>>>>>>>>> Hello Igniters!
>>>>>>>>>> 
>>>>>>>>>> I have one conceptual question:
>>>>>>>>>> 
>>>>>>>>>> When we put an object in IgniteCache, how it is stored?
>>>>>>>>>> 
>>>>>>>>>> As I understand, after marshalling we have an array
of bytes,
>>>>>>>>>> 1) in a local node it is wrapped in BinaryObjectImpl
and stored in
>>>>>>> memory
>>>>>>>>>> 2) it is sent to remote node as byte array where
it will be
>>> wrapped
>>>>> in
>>>>>>>>>> BinaryObjectImpl and be stored in memory
>>>>>>>>>> 
>>>>>>>>>> --
>>>>>>>>>> Best Regards, Vyacheslav
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>> 
>>>>>>>> 
>>>>>>>> --
>>>>>>>> Best Regards, Vyacheslav
>>>>>>> 
>>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> --
>>>>>> Best Regards, Vyacheslav
>>>>> 
>>>>> 
>>>> 
>>>> 
>>>> --
>>>> Best Regards, Vyacheslav
>>> 
>>> 
>> 
>> 
>> --
>> Best Regards, Vyacheslav
>> 
> 
> 
> 
> -- 
> Best Regards, Vyacheslav


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