amazon web services - Modeling data in NoSQL DynamoDB -

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i'm trying figure out how model following data in aws dynamodb table.

i have lot of iot devices, each sends telemetry data every few seconds.

attributes

  1. device_id
  2. timestamp
  3. malware_name
  4. company_name
  5. action_performed (two possible values)

queries

  1. show incidents happened in last week.
  2. show incidents specific device_id.
  3. show incidents action "unable_to_remove".
  4. show incidents related specific malware.
  5. show incidents related specific company.

thoughts

  1. i understand can add gsi's each attribute, use gsi's if there no other choice costs me more money.

  2. what main primary-key (partition-key:sort-key) ?

please share thoughts, care them more care perfect answer i'm trying learn how think , consider instead of having answer specific question.

thanks lot !

if absolutely need querability patterns mentioned, have no way out create gsis each. has set of caveats:

  • for query #1, gsi incident_date (or whatever) partition-key , device_id sort-key. might lead hot partitioning in dynamodb, based on access patterns.
  • there limit of 5 gsis per table, you'll use right away. what'll if need support kind of query in future?

while evaluating pros , cons of using nosql given situation, 1 needs consider both read , write access patterns. so, question should ask is, why dynamodb?

for e.g., really need realtime queries? if not, can use dynamodb main database , periodically sync data (using aws lambda or kinesis firehose) emr or redshift later batch processing.

edit: proposed primary key:

  • device_id partition-key , incident_date sort-key, if know no 2 or more incidents, given device_id, can come @ exact same time.
  • if above doesn't work, incident_id partition-key , incident_date sort-key.

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