# Converting bits to bytes

**URL:** <https://discuss.elastic.co/t/converting-bits-to-bytes/144714>\
**Category:** Logstash\
**Created:** [August 16, 2018, 12:26pm UTC](https://discuss.elastic.co/t/converting-bits-to-bytes/144714 "2018-08-16T12:26:40Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![amakarenkov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/amakarenkov/32/17364_2.png) [@amakarenkov](https://discuss.elastic.co/u/amakarenkov)\
**Post date:** [August 16, 2018, 12:26pm UTC](https://discuss.elastic.co/t/converting-bits-to-bytes/144714/1 "2018-08-16T12:26:40Z")

</div>

Greetings, guys!

Here I am with my awfull questions once again! Fast forward to my case:

What I am looking is to convert bits to bytes so I can use Kibana standart tools for working with bytes data type.  
My input to logstash is basically json file with lots of stuff:

```
{"start":{"connected":[{"socket":5,"local_host":"10.3.201.9","local_port":34726,"remote_host":"10.3.5.144","remote_port":5201}],"version":"iperf 3.1.7","system_info":"LinuxRTR 3.10.0-862.el7.x86_64 #1 SMP Fri Apr 20 16:44:24 UTC 2018 
x86_64","timestamp":{"time":"Thu, 16 Aug 2018 10:40:28 GMT","timesecs":1534416028},"connecting_to":
{"host":"10.3.5.144","port":5201},"cookie":"LinuxRTR.1534416028.751162.03","tcp_mss_default":1448,"test_start":
{"protocol":"TCP","num_streams":1,"blksize":131072,"omit":3,"duration":10,"bytes":0,"blocks":0,"reverse":1}},"intervals":[{"streams":
[{"socket":5,"start":0,"end":10.000026,"seconds":10.000026,"bytes":902181608,"bits_per_second":721743427.96794,"omitted":false}],"sum":
{"start":0,"end":10.000026,"seconds":10.000026,"bytes":902181608,"bits_per_second":721743427.96794,"omitted":false}}],"end":{"streams":[{"sender":
{"socket":5,"start":0,"end":10.000026,"seconds":10.000026,"bytes":903872512,"bits_per_second":723096130.444883},"receiver":
{"socket":5,"start":0,"end":10.000026,"seconds":10.000026,"bytes":902429272,"bits_per_second":721941541.445386}}],"sum_sent":
{"start":0,"end":10.000026,"seconds":10.000026,"bytes":903872512,"bits_per_second":723096130.444883},"sum_received":
{"start":0,"end":10.000026,"seconds":10.000026,"bytes":902429272,"bits_per_second":721941541.445386},"cpu_utilization_percent":
{"host_total":28.089542,"host_user":4.618185,"host_system":23.497408,"remote_total":16.10341,"remote_user":2.905974,"remote_system":13.197436},"receiver_tcp_congestion":"cubic"}}

```

Im looking for translating existing field **end.sum\_received.bits\_per\_second** into completely new field **new\_field\_bytes\_per\_second**

Here is filter:

```
input {
  beats {
    port => 5044
    codec => "json_lines"
  }
}

 filter {
  if [end][sum_received][bits_per_second] {
    ruby {
      code => "event['new_field_bytes_per_second'] = event['[end][sum_received][bits_per_second]'] / 8"
    }
  }
}

output {
  stdout {
    codec => rubydebug
  }
  elasticsearch {
    hosts => "localhost"
    index => "iperf3-%{+YYYY-MM-dd}"
  }

```

Im struggling with filter, I think Im doing something wrong, cause I cannot find my new field in Kibana...

---

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [August 16, 2018, 1:37pm UTC](https://discuss.elastic.co/t/converting-bits-to-bytes/144714/2 "2018-08-16T13:37:34Z")

</div>

> [@amakarenkov](#):
>
> code =\> "event['new\_field\_bytes\_per\_second'] = event['[end][sum\_received][bits\_per\_second]'] / 8"

Try

```
code => "event.set('new_field_bytes_per_second', event.get('[end][sum_received][bits_per_second]') / 8)"

```

---

<div class="post-metadata">

**Author:** ![amakarenkov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/amakarenkov/32/17364_2.png) [@amakarenkov](https://discuss.elastic.co/u/amakarenkov)\
**Post date:** [August 16, 2018, 2:36pm UTC](https://discuss.elastic.co/t/converting-bits-to-bytes/144714/4 "2018-08-16T14:36:32Z")

</div>

Hi! And thank you for help, sir! It worked! ![:slight_smile:](https://emoji.discourse-cdn.com/twitter/slight_smile.png?v=5)

P.S. It seems that I have to completely delete index and add it again to force logstash filter to work with new configuration. I may be wrong, but my new configuration started to work only after I did reboot my server and deleted this particular index

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [September 13, 2018, 2:36pm UTC](https://discuss.elastic.co/t/converting-bits-to-bytes/144714/5 "2018-09-13T14:36:32Z")

</div>

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