find command find multiple extensions

find ./ -type f \( -iname \*.jpg -o -iname \*.png \)

php sending chunked encoding response

<?php

header("Transfer-encoding: chunked");

@apache_setenv('no-gzip', 1);

@ini_set('zlib.output_compression', 0);

@ini_set('implicit_flush', 1);

for ($i = 0; $i < ob_get_level(); $i++)  ob_end_flush();

ob_implicit_flush(1); flush();

function dump_chunk($chunk)

{

  printf("%x\r\n%s\r\n", strlen($chunk), $chunk);

  flush();

}

for ($i=0;$i<2;++$i) {

        $output = array();

        for ($i=0;$i<20;++$i) {

                $output[] = str_repeat("-=", 100);

        }

        dump_chunk(implode("\n", $output));

        usleep(500000);

}

dump_chunk("");

?>

show only some characters in grep

grep -r -E -o ".{0,10}needle.{0,10}" *

Azure 70 534 notes

https://www.safaribooksonline.com/library/view/Exam+Ref+70-534+Architecting+Microsoft+Azure+Solutions/9780735697706/

Compute instances:

RDMA capable backend

Azure Batch and TVM

- for long running tasks

How do Homogeneous instances handle session replication?

- Sticky sessions

- External starte store(for e.g. redis)

Scheduled vs Reactive scaling (reactive means there will be some delay in scaling)
--------------
Azure Traffic Manager - redirects traffic based on round robin/performance etc. Triggered in DNS phase, so the actual traffic doesn't pass through it.