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Posted to common-dev@hadoop.apache.org by mohmmadanis moulavi <an...@yahoo.co.in> on 2011/11/28 12:16:59 UTC
Tasktrackers Information
Friends,
I want to know, how Jobtracker stores information about tasktracker & their tasks?
and also where does Jobtracker store this information?, if anyone know about this, please let me know it.
Thanks & Regards,
Mohmmadanis Moulavi
Student,
MTech (Computer Sci. & Engg.)
Walchand college of Engg. Sangli (M.S.) India
Fw: How Jobtrakcer stores Tasktrackers Information
Posted by mohmmadanis moulavi <an...@yahoo.co.in>.
Friends,
What is use of TreeMapdata structure in JobTracker.java file
If anyone know it, please let me know it
Thanks & Regards,
Mohmmadanis Moulavi
Student,
MTech (Computer Sci. & Engg.)
How Jobtrakcer stores Tasktrackers Information
Posted by mohmmadanis moulavi <an...@yahoo.co.in>.
Friends,
I want to know, how Jobtracker stores information about tasktracker & their tasks?
is it stored in memory or is it stored in file?
If anyone knows it, please let me know it
Thanks & Regards,
Mohmmadanis Moulavi
Student,
MTech (Computer Sci. & Engg.)
Walchand college of Engg. Sangli (M.S.) India
Re:How Jobtrakcer stores Tasktrackers Information
Posted by 郭冲 <gu...@126.com>.
the heartbeat is the way that jobtracker and tasktracker communicate with each other, tasktracker send heartbeat to jobtracker continuously, and jobtracker returns the task or something else. tasktracker instance call the func heartbeat() in jobtracker.java to send heartbeat.
At 2011-12-01 14:37:39,"mohmmadanis moulavi" <an...@yahoo.co.in> wrote:
>
>
>
>
>
>
> I want to know from where Jobtracker sends task(taskid) to tasktarcker for scheduling.
> i.e where it creates taskid & tasktracker pairs
>
>
>
>
>Thanks & Regards,
>
>Mohmmadanis Moulavi
>
>Student,
>MTech (Computer Sci. & Engg.)
>Walchand college of Engg. Sangli (M.S.) India
How Jobtrakcer stores Tasktrackers Information
Posted by mohmmadanis moulavi <an...@yahoo.co.in>.
I want to know from where Jobtracker sends task(taskid) to tasktarcker for scheduling.
i.e where it creates taskid & tasktracker pairs
Thanks & Regards,
Mohmmadanis Moulavi
Student,
MTech (Computer Sci. & Engg.)
Walchand college of Engg. Sangli (M.S.) India
How Jobtrakcer stores Tasktrackers Information
Posted by mohmmadanis moulavi <an...@yahoo.co.in>.
I want to know from where Jobtracker sends task(taskid) to tasktarcker for scheduling.
i.e where it creates taskid & tasktracker pairs
Thanks & Regards,
Mohmmadanis Moulavi
Student,
MTech (Computer Sci. & Engg.)
Walchand college of Engg. Sangli (M.S.) India
Re: How Jobtrakcer stores Tasktrackers Information
Posted by Nan Zhu <zh...@gmail.com>.
I'm not sure what's the exact meaning of the tasktracker information you
mentioned
there is a "TaskTrackerStatus" class, and when the system runs, tt jt
transmits serialized objects of this class which contains some information
through heartbeat
and there is a hashmap<string, TaskTrackerStatus> in JobTracker,
Best,
Nan
On Wed, Nov 30, 2011 at 9:26 PM, mohmmadanis moulavi <
anis_moulavi@yahoo.co.in> wrote:
>
>
>
>
>
> Friends,
>
>
>
> I want to know, how Jobtracker stores information about
> tasktracker & their tasks?
> is it stored in memory or is it stored in file?
> If anyone knows it, please let me know it
>
>
>
>
>
>
>
> Thanks & Regards,
>
> Mohmmadanis Moulavi
>
> Student,
> MTech (Computer Sci. & Engg.)
> Walchand college of Engg. Sangli (M.S.) India
--
Nan Zhu
School of Electronic, Information and Electrical Engineering,229
Shanghai Jiao Tong University
800,Dongchuan Road,Shanghai,China
E-Mail: zhunansjtu@gmail.com
How Jobtrakcer stores Tasktrackers Information
Posted by mohmmadanis moulavi <an...@yahoo.co.in>.
Friends,
I want to know, how Jobtracker stores information about tasktracker & their tasks?
is it stored in memory or is it stored in file?
If anyone knows it, please let me know it
Thanks & Regards,
Mohmmadanis Moulavi
Student,
MTech (Computer Sci. & Engg.)
Walchand college of Engg. Sangli (M.S.) India
Fw: Tasktrackers Information
Posted by mohmmadanis moulavi <an...@yahoo.co.in>.
Friends,
I want to know, how Jobtracker stores information about tasktracker & their tasks?
and also where does Jobtracker store this information?, if anyone know about this, please let me know it.
Thanks & Regards,
Mohmmadanis Moulavi
Student,
MTech (Computer Sci. & Engg.)
Walchand college of Engg. Sangli (M.S.) India