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Posted to derby-user@db.apache.org by Yoel Spotts <YS...@nexidia.com> on 2013/09/04 19:27:27 UTC
Network Server startup and shutdown
I am starting a network server in addition to an embedded server. I'd like to do this programmatically, by calling
NetworkServerControl server = new NetworkServerControl();
server.start (null);
as described here: http://docs.oracle.com/javadb/10.5.1.1/adminguide/tadminconfig814963.html
My question is: should I start the network server first or the embedded server?
And when shutting down, which one should I shutdown first?
Thanks!
Yoel Spotts
Re: Network Server startup and shutdown
Posted by Rick Hillegas <ri...@oracle.com>.
On 9/9/13 7:05 AM, Yoel Spotts wrote:
> Rick,
>
> Thanks for the quick response and help. If that is the case (i.e. there is a race condition possibility), why would you recommend shutting down the engine first?
Hi Yoel,
You can do it either way. Bringing down the engine first minimizes the
risk that your application will exit without gracefully parking the
engine. But if you need to handle the race condition, then bring down
the server first.
Regards,
-Rick
> Yoel
>
> -----Original Message-----
> From: Rick Hillegas [mailto:rick.hillegas@oracle.com]
> Sent: Monday, September 09, 2013 10:02 AM
> To: derby-user@db.apache.org
> Subject: Re: Network Server startup and shutdown
>
> On 9/9/13 6:56 AM, Yoel Spotts wrote:
>> Rick,
>>
>> Interesting. Thanks for the info.
>>
>> Can you help me understand this a little better: if I shutdown the engine (by calling DriverManager.getConnection("jdbc:derby:;shutdown=true")), won't the network service be "orphaned" (i.e. a network service without an underlying engine -- even if for a only a short period of time)?
> Yes, that's true. If you are worried about that race condition, you can bring the server down first and then the engine.
>
> Hope that's more useful for you,
> -Rick
>> Thanks
>>
>> Yoel
>>
>> -----Original Message-----
>> From: Rick Hillegas [mailto:rick.hillegas@oracle.com]
>> Sent: Monday, September 09, 2013 9:43 AM
>> To: derby-user@db.apache.org
>> Subject: Re: Network Server startup and shutdown
>>
>> On 9/4/13 10:27 AM, Yoel Spotts wrote:
>>> I am starting a network server in addition to an embedded server. I'd
>>> like to do this programmatically, by calling
>>>
>>> NetworkServerControl server = new NetworkServerControl();
>>>
>>> server.start (null);
>>>
>>> as described here:
>>> http://docs.oracle.com/javadb/10.5.1.1/adminguide/tadminconfig814963.
>>> h
>>> tml
>>>
>>> My question is: should I start the network server first or the
>>> embedded server?
>>>
>> Hi Yoel,
>>
>> This can be a little puzzling for people who are familiar with non-embedded databases. I think what you mean is the network server and the embedded engine. There is no such thing as an embedded server. The network server boots the derby engine as needed. You don't need to boot the engine.
>>> And when shutting down, which one should I shutdown first?
>>>
>> I would recommend bringing down the engine first and then the server.
>>
>> Hope this helps,
>> -Rick
>>> Thanks!
>>>
>>> Yoel Spotts
>>>
>
RE: Network Server startup and shutdown
Posted by Yoel Spotts <YS...@nexidia.com>.
Rick,
Thanks for the quick response and help. If that is the case (i.e. there is a race condition possibility), why would you recommend shutting down the engine first?
Yoel
-----Original Message-----
From: Rick Hillegas [mailto:rick.hillegas@oracle.com]
Sent: Monday, September 09, 2013 10:02 AM
To: derby-user@db.apache.org
Subject: Re: Network Server startup and shutdown
On 9/9/13 6:56 AM, Yoel Spotts wrote:
> Rick,
>
> Interesting. Thanks for the info.
>
> Can you help me understand this a little better: if I shutdown the engine (by calling DriverManager.getConnection("jdbc:derby:;shutdown=true")), won't the network service be "orphaned" (i.e. a network service without an underlying engine -- even if for a only a short period of time)?
Yes, that's true. If you are worried about that race condition, you can bring the server down first and then the engine.
Hope that's more useful for you,
-Rick
> Thanks
>
> Yoel
>
> -----Original Message-----
> From: Rick Hillegas [mailto:rick.hillegas@oracle.com]
> Sent: Monday, September 09, 2013 9:43 AM
> To: derby-user@db.apache.org
> Subject: Re: Network Server startup and shutdown
>
> On 9/4/13 10:27 AM, Yoel Spotts wrote:
>> I am starting a network server in addition to an embedded server. I'd
>> like to do this programmatically, by calling
>>
>> NetworkServerControl server = new NetworkServerControl();
>>
>> server.start (null);
>>
>> as described here:
>> http://docs.oracle.com/javadb/10.5.1.1/adminguide/tadminconfig814963.
>> h
>> tml
>>
>> My question is: should I start the network server first or the
>> embedded server?
>>
> Hi Yoel,
>
> This can be a little puzzling for people who are familiar with non-embedded databases. I think what you mean is the network server and the embedded engine. There is no such thing as an embedded server. The network server boots the derby engine as needed. You don't need to boot the engine.
>> And when shutting down, which one should I shutdown first?
>>
> I would recommend bringing down the engine first and then the server.
>
> Hope this helps,
> -Rick
>> Thanks!
>>
>> Yoel Spotts
>>
>
Re: Network Server startup and shutdown
Posted by Rick Hillegas <ri...@oracle.com>.
On 9/9/13 6:56 AM, Yoel Spotts wrote:
> Rick,
>
> Interesting. Thanks for the info.
>
> Can you help me understand this a little better: if I shutdown the engine (by calling DriverManager.getConnection("jdbc:derby:;shutdown=true")), won't the network service be "orphaned" (i.e. a network service without an underlying engine -- even if for a only a short period of time)?
Yes, that's true. If you are worried about that race condition, you can
bring the server down first and then the engine.
Hope that's more useful for you,
-Rick
> Thanks
>
> Yoel
>
> -----Original Message-----
> From: Rick Hillegas [mailto:rick.hillegas@oracle.com]
> Sent: Monday, September 09, 2013 9:43 AM
> To: derby-user@db.apache.org
> Subject: Re: Network Server startup and shutdown
>
> On 9/4/13 10:27 AM, Yoel Spotts wrote:
>> I am starting a network server in addition to an embedded server. I'd
>> like to do this programmatically, by calling
>>
>> NetworkServerControl server = new NetworkServerControl();
>>
>> server.start (null);
>>
>> as described here:
>> http://docs.oracle.com/javadb/10.5.1.1/adminguide/tadminconfig814963.h
>> tml
>>
>> My question is: should I start the network server first or the
>> embedded server?
>>
> Hi Yoel,
>
> This can be a little puzzling for people who are familiar with non-embedded databases. I think what you mean is the network server and the embedded engine. There is no such thing as an embedded server. The network server boots the derby engine as needed. You don't need to boot the engine.
>> And when shutting down, which one should I shutdown first?
>>
> I would recommend bringing down the engine first and then the server.
>
> Hope this helps,
> -Rick
>> Thanks!
>>
>> Yoel Spotts
>>
>
RE: Network Server startup and shutdown
Posted by Yoel Spotts <YS...@nexidia.com>.
Rick,
Interesting. Thanks for the info.
Can you help me understand this a little better: if I shutdown the engine (by calling DriverManager.getConnection("jdbc:derby:;shutdown=true")), won't the network service be "orphaned" (i.e. a network service without an underlying engine -- even if for a only a short period of time)?
Thanks
Yoel
-----Original Message-----
From: Rick Hillegas [mailto:rick.hillegas@oracle.com]
Sent: Monday, September 09, 2013 9:43 AM
To: derby-user@db.apache.org
Subject: Re: Network Server startup and shutdown
On 9/4/13 10:27 AM, Yoel Spotts wrote:
>
> I am starting a network server in addition to an embedded server. I'd
> like to do this programmatically, by calling
>
> NetworkServerControl server = new NetworkServerControl();
>
> server.start (null);
>
> as described here:
> http://docs.oracle.com/javadb/10.5.1.1/adminguide/tadminconfig814963.h
> tml
>
> My question is: should I start the network server first or the
> embedded server?
>
Hi Yoel,
This can be a little puzzling for people who are familiar with non-embedded databases. I think what you mean is the network server and the embedded engine. There is no such thing as an embedded server. The network server boots the derby engine as needed. You don't need to boot the engine.
>
> And when shutting down, which one should I shutdown first?
>
I would recommend bringing down the engine first and then the server.
Hope this helps,
-Rick
>
> Thanks!
>
> Yoel Spotts
>
Re: Network Server startup and shutdown
Posted by Rick Hillegas <ri...@oracle.com>.
On 9/4/13 10:27 AM, Yoel Spotts wrote:
>
> I am starting a network server in addition to an embedded server. I’d
> like to do this programmatically, by calling
>
> NetworkServerControl server = new NetworkServerControl();
>
> server.start (null);
>
> as described here:
> http://docs.oracle.com/javadb/10.5.1.1/adminguide/tadminconfig814963.html
>
> My question is: should I start the network server first or the
> embedded server?
>
Hi Yoel,
This can be a little puzzling for people who are familiar with
non-embedded databases. I think what you mean is the network server and
the embedded engine. There is no such thing as an embedded server. The
network server boots the derby engine as needed. You don't need to boot
the engine.
>
> And when shutting down, which one should I shutdown first?
>
I would recommend bringing down the engine first and then the server.
Hope this helps,
-Rick
>
> Thanks!
>
> Yoel Spotts
>