Re: usage of Apache ignite as Key value DB

[Denis Magda]

> On Jan 17, 2018, at 4:30 AM, Rajesh Kishore  wrote:
> 
> Hello Mikael,
> 
> Thanks a ton for your response. I got descent understanding that for any 
> operation I need to define cache and the cache item can be persisted.
> - Does it mean all CRUD operations would be performed via cache operations ?

Yes.

> - Consider the case of berkley db where entities are stored locally in file 
> system. And these entry container were defined by the berkley db apis, so how 
> entities container are created in Ignite , is it driven by cacheName? where 
> the entities are stored? To be simple where the records for "Person" & 
> "Department" would be stored and how that can be configured

Think of a cache as of a table in an RBMS. So “Person” and “Department” will be 
stored in separate caches.

Data grid (key-value) examples should boost your plunging into Ignite concepts:
https://github.com/apache/ignite/tree/master/examples/src/main/java/org/apache/ignite/examples/datagrid
 


—
Denis

> 
> Thanks,
> Rajesh
> 
> On Wed, Jan 17, 2018 at 5:37 PM, Mikael  > wrote:
> There are lots of examples not using SQL, have a look at:
> 
> https://apacheignite.readme.io/docs/jcache 
> 
> Ignite implements the JCache API, just use get/put and so on.
> 
> 
> Den 2018-01-17 kl. 12:44, skrev Rajesh Kishore:
>> This is much informative. Further I want to use key value apis instead of 
>> sql apis which is only given in the example. 
>> The idea is that it should ease my migration process from Berkley dB based 
>> code where I am relying on key value apis to play with record in different 
>> dB containers, what is the equivalent here of ignite i.e how do we represent 
>> different entity say employee in local file system and how to insert and 
>> retrieve record 
>> 
>> Thanks 
>> Rajesh 
>> 
>> On 17 Jan 2018 3:59 p.m., "Mikael" > > wrote:
>> You have to run an Ignite instance to use it (you can embed it in your 
>> application), you can't just use the key value store on it's own, a LOCAL 
>> cache would be the closest to a Berkeley DB store.
>> 
>> Docs at : https://apacheignite.readme.io/docs/data-grid 
>> 
>> 
>> 
>> 
>> Den 2018-01-17 kl. 11:05, skrev Rajesh Kishore:
>> Hi,
>> 
>> I am newbie to Apache Ignite. We are trying to explore Ignite as key value 
>> DB to be replaced with our existing Berkely DB in application.
>> 
>> Currently, Bekley DB is embedded in the application and db container 
>> operations are performed using Berkely DB apis , similar functionalities we 
>> would need for Ignite.
>> 
>> The idea is to replace berkley db apis to Ignite apis to use Ignite as key 
>> value DB.
>> I could not find any docs for the usage of ignite libraries to be used in 
>> the application.
>> 
>> Any pointers please
>> 
>> Thanks & Regards,
>> Rajesh Kishore
>> 
> 
> 

Re: usage of Apache ignite as Key value DB

[Rajesh Kishore]

Hi Mikael,

Thanks a lot for your response, got a fair understanding of this.
Have some queries on Indexes , starting a new thread for this.

Thanks,
Rajesh

On Wed, Jan 17, 2018 at 6:33 PM, Mikael  wrote:

> There are a number of ways do to persistence for the cache, you can enable
> native persistence for a memory region and assign a cache to that region,
> all cache entries will be cached on disk och the ones you use most will be
> cached in RAM, another alternative is to add 3rd party class to enable
> persistence, the cache will call your implementation to do the persistence
> (JDBC and Cassandra is built in), you can do read only or both read and
> write persistence.
>
> Your key/value objects can be created with SQL DDL queries or you can use
> POJO's.
>
> Native persistence information:
>
> https://apacheignite.readme.io/docs/distributed-persistent-store
>
> Do your own storage:
>
> https://apacheignite.readme.io/docs/data-loading
>
> https://apacheignite.readme.io/docs/3rd-party-stor
>
> You can do all CRUD operations using the cache API or/and SQL, if you use
> native persistence SQL quesries work on the entire cache even if items not
> in RAM, if you use 3rd party persistence SQL queries will only work on
> items in RAM.
>
> Hope that helps a little.
> Mikael
>
>
> Den 2018-01-17 kl. 13:30, skrev Rajesh Kishore:
>
> Hello Mikael,
>
> Thanks a ton for your response. I got descent understanding that for any
> operation I need to define cache and the cache item can be persisted.
> - Does it mean all CRUD operations would be performed via cache operations
> ?
> - Consider the case of berkley db where entities are stored locally in
> file system. And these entry container were defined by the berkley db apis,
> so how entities container are created in Ignite , is it driven by
> cacheName? where the entities are stored? To be simple where the records
> for "Person" & "Department" would be stored and how that can be configured
>
> Thanks,
> Rajesh
>
> On Wed, Jan 17, 2018 at 5:37 PM, Mikael  wrote:
>
>> There are lots of examples not using SQL, have a look at:
>>
>> https://apacheignite.readme.io/docs/jcache
>>
>> Ignite implements the JCache API, just use get/put and so on.
>>
>>
>> Den 2018-01-17 kl. 12:44, skrev Rajesh Kishore:
>>
>> This is much informative. Further I want to use key value apis instead of
>> sql apis which is only given in the example.
>> The idea is that it should ease my migration process from Berkley dB
>> based code where I am relying on key value apis to play with record in
>> different dB containers, what is the equivalent here of ignite i.e how do
>> we represent different entity say employee in local file system and how to
>> insert and retrieve record
>>
>> Thanks
>> Rajesh
>>
>> On 17 Jan 2018 3:59 p.m., "Mikael"  wrote:
>>
>>> You have to run an Ignite instance to use it (you can embed it in your
>>> application), you can't just use the key value store on it's own, a LOCAL
>>> cache would be the closest to a Berkeley DB store.
>>>
>>> Docs at : https://apacheignite.readme.io/docs/data-grid
>>>
>>>
>>>
>>> Den 2018-01-17 kl. 11:05, skrev Rajesh Kishore:
>>>
 Hi,

 I am newbie to Apache Ignite. We are trying to explore Ignite as key
 value DB to be replaced with our existing Berkely DB in application.

 Currently, Bekley DB is embedded in the application and db container
 operations are performed using Berkely DB apis , similar functionalities we
 would need for Ignite.

 The idea is to replace berkley db apis to Ignite apis to use Ignite as
 key value DB.
 I could not find any docs for the usage of ignite libraries to be used
 in the application.

 Any pointers please

 Thanks & Regards,
 Rajesh Kishore

>>>
>>>
>>
>
>

Re: usage of Apache ignite as Key value DB

[Mikael]

There are a number of ways do to persistence for the cache, you can 
enable native persistence for a memory region and assign a cache to that 
region, all cache entries will be cached on disk och the ones you use 
most will be cached in RAM, another alternative is to add 3rd party 
class to enable persistence, the cache will call your implementation to 
do the persistence (JDBC and Cassandra is built in), you can do read 
only or both read and write persistence.


Your key/value objects can be created with SQL DDL queries or you can 
use POJO's.


Native persistence information:

https://apacheignite.readme.io/docs/distributed-persistent-store

Do your own storage:

https://apacheignite.readme.io/docs/data-loading

https://apacheignite.readme.io/docs/3rd-party-stor

You can do all CRUD operations using the cache API or/and SQL, if you 
use native persistence SQL quesries work on the entire cache even if 
items not in RAM, if you use 3rd party persistence SQL queries will only 
work on items in RAM.


Hope that helps a little.

Mikael

Den 2018-01-17 kl. 13:30, skrev Rajesh Kishore:

Hello Mikael,

Thanks a ton for your response. I got descent understanding that for 
any operation I need to define cache and the cache item can be persisted.
- Does it mean all CRUD operations would be performed via cache 
operations ?
- Consider the case of berkley db where entities are stored locally in 
file system. And these entry container were defined by the berkley db 
apis, so how entities container are created in Ignite , is it driven 
by cacheName? where the entities are stored? To be simple where the 
records for "Person" & "Department" would be stored and how that can 
be configured


Thanks,
Rajesh

On Wed, Jan 17, 2018 at 5:37 PM, Mikael > wrote:


There are lots of examples not using SQL, have a look at:

https://apacheignite.readme.io/docs/jcache


Ignite implements the JCache API, just use get/put and so on.


Den 2018-01-17 kl. 12:44, skrev Rajesh Kishore:

This is much informative. Further I want to use key value apis
instead of sql apis which is only given in the example.
The idea is that it should ease my migration process from Berkley
dB based code where I am relying on key value apis to play with
record in different dB containers, what is the equivalent here of
ignite i.e how do we represent different entity say employee in
local file system and how to insert and retrieve record

Thanks
Rajesh

On 17 Jan 2018 3:59 p.m., "Mikael" > wrote:

You have to run an Ignite instance to use it (you can embed
it in your application), you can't just use the key value
store on it's own, a LOCAL cache would be the closest to a
Berkeley DB store.

Docs at : https://apacheignite.readme.io/docs/data-grid




Den 2018-01-17 kl. 11:05, skrev Rajesh Kishore:

Hi,

I am newbie to Apache Ignite. We are trying to explore
Ignite as key value DB to be replaced with our existing
Berkely DB in application.

Currently, Bekley DB is embedded in the application and
db container operations are performed using Berkely DB
apis , similar functionalities we would need for Ignite.

The idea is to replace berkley db apis to Ignite apis to
use Ignite as key value DB.
I could not find any docs for the usage of ignite
libraries to be used in the application.

Any pointers please

Thanks & Regards,
Rajesh Kishore

Re: usage of Apache ignite as Key value DB

[Rajesh Kishore]

Hello Mikael,

Thanks a ton for your response. I got descent understanding that for any
operation I need to define cache and the cache item can be persisted.
- Does it mean all CRUD operations would be performed via cache operations ?
- Consider the case of berkley db where entities are stored locally in file
system. And these entry container were defined by the berkley db apis, so
how entities container are created in Ignite , is it driven by cacheName?
where the entities are stored? To be simple where the records for "Person"
& "Department" would be stored and how that can be configured

Thanks,
Rajesh

On Wed, Jan 17, 2018 at 5:37 PM, Mikael  wrote:

> There are lots of examples not using SQL, have a look at:
>
> https://apacheignite.readme.io/docs/jcache
>
> Ignite implements the JCache API, just use get/put and so on.
>
>
> Den 2018-01-17 kl. 12:44, skrev Rajesh Kishore:
>
> This is much informative. Further I want to use key value apis instead of
> sql apis which is only given in the example.
> The idea is that it should ease my migration process from Berkley dB based
> code where I am relying on key value apis to play with record in different
> dB containers, what is the equivalent here of ignite i.e how do we
> represent different entity say employee in local file system and how to
> insert and retrieve record
>
> Thanks
> Rajesh
>
> On 17 Jan 2018 3:59 p.m., "Mikael"  wrote:
>
>> You have to run an Ignite instance to use it (you can embed it in your
>> application), you can't just use the key value store on it's own, a LOCAL
>> cache would be the closest to a Berkeley DB store.
>>
>> Docs at : https://apacheignite.readme.io/docs/data-grid
>>
>>
>>
>> Den 2018-01-17 kl. 11:05, skrev Rajesh Kishore:
>>
>>> Hi,
>>>
>>> I am newbie to Apache Ignite. We are trying to explore Ignite as key
>>> value DB to be replaced with our existing Berkely DB in application.
>>>
>>> Currently, Bekley DB is embedded in the application and db container
>>> operations are performed using Berkely DB apis , similar functionalities we
>>> would need for Ignite.
>>>
>>> The idea is to replace berkley db apis to Ignite apis to use Ignite as
>>> key value DB.
>>> I could not find any docs for the usage of ignite libraries to be used
>>> in the application.
>>>
>>> Any pointers please
>>>
>>> Thanks & Regards,
>>> Rajesh Kishore
>>>
>>
>>
>

Re: usage of Apache ignite as Key value DB

[Mikael]

There are lots of examples not using SQL, have a look at:

https://apacheignite.readme.io/docs/jcache

Ignite implements the JCache API, just use get/put and so on.


Den 2018-01-17 kl. 12:44, skrev Rajesh Kishore:
This is much informative. Further I want to use key value apis instead 
of sql apis which is only given in the example.
The idea is that it should ease my migration process from Berkley dB 
based code where I am relying on key value apis to play with record in 
different dB containers, what is the equivalent here of ignite i.e how 
do we represent different entity say employee in local file system and 
how to insert and retrieve record


Thanks
Rajesh

On 17 Jan 2018 3:59 p.m., "Mikael" > wrote:


You have to run an Ignite instance to use it (you can embed it in
your application), you can't just use the key value store on it's
own, a LOCAL cache would be the closest to a Berkeley DB store.

Docs at : https://apacheignite.readme.io/docs/data-grid




Den 2018-01-17 kl. 11:05, skrev Rajesh Kishore:

Hi,

I am newbie to Apache Ignite. We are trying to explore Ignite
as key value DB to be replaced with our existing Berkely DB in
application.

Currently, Bekley DB is embedded in the application and db
container operations are performed using Berkely DB apis ,
similar functionalities we would need for Ignite.

The idea is to replace berkley db apis to Ignite apis to use
Ignite as key value DB.
I could not find any docs for the usage of ignite libraries to
be used in the application.

Any pointers please

Thanks & Regards,
Rajesh Kishore

Re: usage of Apache ignite as Key value DB

[Rajesh Kishore]

This is much informative. Further I want to use key value apis instead of
sql apis which is only given in the example.
The idea is that it should ease my migration process from Berkley dB based
code where I am relying on key value apis to play with record in different
dB containers, what is the equivalent here of ignite i.e how do we
represent different entity say employee in local file system and how to
insert and retrieve record

Thanks
Rajesh

On 17 Jan 2018 3:59 p.m., "Mikael"  wrote:

> You have to run an Ignite instance to use it (you can embed it in your
> application), you can't just use the key value store on it's own, a LOCAL
> cache would be the closest to a Berkeley DB store.
>
> Docs at : https://apacheignite.readme.io/docs/data-grid
>
>
>
> Den 2018-01-17 kl. 11:05, skrev Rajesh Kishore:
>
>> Hi,
>>
>> I am newbie to Apache Ignite. We are trying to explore Ignite as key
>> value DB to be replaced with our existing Berkely DB in application.
>>
>> Currently, Bekley DB is embedded in the application and db container
>> operations are performed using Berkely DB apis , similar functionalities we
>> would need for Ignite.
>>
>> The idea is to replace berkley db apis to Ignite apis to use Ignite as
>> key value DB.
>> I could not find any docs for the usage of ignite libraries to be used in
>> the application.
>>
>> Any pointers please
>>
>> Thanks & Regards,
>> Rajesh Kishore
>>
>
>

Re: usage of Apache ignite as Key value DB

[Mikael]

You have to run an Ignite instance to use it (you can embed it in your 
application), you can't just use the key value store on it's own, a 
LOCAL cache would be the closest to a Berkeley DB store.


Docs at : https://apacheignite.readme.io/docs/data-grid



Den 2018-01-17 kl. 11:05, skrev Rajesh Kishore:

Hi,

I am newbie to Apache Ignite. We are trying to explore Ignite as key 
value DB to be replaced with our existing Berkely DB in application.


Currently, Bekley DB is embedded in the application and db container 
operations are performed using Berkely DB apis , similar 
functionalities we would need for Ignite.


The idea is to replace berkley db apis to Ignite apis to use Ignite as 
key value DB.
I could not find any docs for the usage of ignite libraries to be used 
in the application.


Any pointers please

Thanks & Regards,
Rajesh Kishore

usage of Apache ignite as Key value DB

[Rajesh Kishore]

Hi,

I am newbie to Apache Ignite. We are trying to explore Ignite as key value
DB to be replaced with our existing Berkely DB in application.

Currently, Bekley DB is embedded in the application and db container
operations are performed using Berkely DB apis , similar functionalities we
would need for Ignite.

The idea is to replace berkley db apis to Ignite apis to use Ignite as key
value DB.
I could not find any docs for the usage of ignite libraries to be used in
the application.

Any pointers please

Thanks & Regards,
Rajesh Kishore