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Date: Sun, 6 Jul 2014 21:38:12 +0530
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Subject: Re: Significance of PID files
From: Giridhar Addepalli <giridhar1202@gmail.com>
To: user@hadoop.apache.org
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At Daemon level.

Thanks,
Giridhar.


On Fri, Jul 4, 2014 at 11:03 AM, Vijaya Narayana Reddy Bhoomi Reddy <
vijay.bhoomireddy@gmail.com> wrote:

> Vikas,
>
> "Its main use is to keep one process at a time...like one one datanode at
> a any host" - Can you please elaborate in a more detail?
>
> What is meant by one process at a time? At what level does a pid file come
> into picture i.e. is it at a deamon level, job level, task level etc?
>
> Thanks
> Vijay
>
>
> On 4 July 2014 10:36, Vikas srivastava <vikas_srivastav@apple.com> wrote:
>
>> Paid files used to store the pic if particular process. Its main use is
>> to keep one process at a time...like one one datanode at a any host
>>  On Jul 4, 2014 10:00 AM, Vijaya Narayana Reddy Bhoomi Reddy <
>> vijay.bhoomireddy@gmail.com> wrote:
>>
>> Hi,
>>
>> Can anyone please explain the significance of the pid files in Hadoop
>> i.e. purpose and usage etc?
>>
>> Thanks & Regards
>> Vijay
>>
>>
>

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<div dir=3D"ltr">At Daemon level.<div><br></div><div>Thanks,</div><div>Giri=
dhar.</div></div><div class=3D"gmail_extra"><br><br><div class=3D"gmail_quo=
te">On Fri, Jul 4, 2014 at 11:03 AM, Vijaya Narayana Reddy Bhoomi Reddy <sp=
an dir=3D"ltr">&lt;<a href=3D"mailto:vijay.bhoomireddy@gmail.com" target=3D=
"_blank">vijay.bhoomireddy@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div dir=3D"ltr">Vikas,<div><br></div><div>&=
quot;<span style=3D"font-family:arial,sans-serif;font-size:13px">Its main u=
se is to keep one process at a time...like one one datanode at a any host&q=
uot; -=C2=A0</span>Can you please elaborate in a more detail?</div>

<div><br></div><div>What is meant by one process at a time? At what level d=
oes a pid file come into picture i.e. is it at a deamon level, job level, t=
ask level etc?</div><div><br></div><div>Thanks</div><div>Vijay</div></div>

<div class=3D"gmail_extra"><br><br><div class=3D"gmail_quote">On 4 July 201=
4 10:36, Vikas srivastava <span dir=3D"ltr">&lt;<a href=3D"mailto:vikas_sri=
vastav@apple.com" target=3D"_blank">vikas_srivastav@apple.com</a>&gt;</span=
> wrote:<br>

<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><p dir=3D"ltr">Paid files used to store the =
pic if particular process. Its main use is to keep one process at a time...=
like one one datanode at a any host </p>
<div><div class=3D"h5">
<div><div>
<div>On Jul 4, 2014 10:00 AM, Vijaya Narayana Reddy Bhoomi Reddy &lt;<a hre=
f=3D"mailto:vijay.bhoomireddy@gmail.com" target=3D"_blank">vijay.bhoomiredd=
y@gmail.com</a>&gt; wrote:<br type=3D"attribution"><blockquote style=3D"mar=
gin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

<div dir=3D"ltr">Hi,<div><br></div><div>Can anyone please explain the signi=
ficance of the pid files in Hadoop i.e. purpose and usage etc?</div><div><b=
r></div><div>Thanks &amp; Regards</div><div>Vijay</div></div>
</blockquote></div>
</div></div></div></div></blockquote></div><br></div>
</blockquote></div><br></div>

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