====== HW 1 – Assigning Analytical Tasks to NoSQL DBMS and Rationale ======
**(5 points)**

Using the task list from HW 0, map each task to the most suitable NoSQL DBMS (document — MongoDB, wide-column — Cassandra, key-value — Redis, graph — Neo4j) and justify the choice. No DB-specific syntax or schema design at this stage.

  * For each task, fill a card (2 p.):
    * Primary DBMS (MongoDB / Cassandra / Redis / Neo4j).
    * Why primary (2–3 reasons) — based on analytics type and access pattern.
    * Alternative 1 — how it would be solved and when to choose it.
    * Alternative 2 (optional) — how it would be solved and when to choose it.
    * Expected output — brief description of result shape.
    * Freshness / target latency (e.g., p95) if applicable.
    * Access pattern & expected selectivity (filters, time range, fan-out).

  * Within each card (2 p.):
    * Justify the choice of DBMS: why this type of data/query fits this DBMS.
    * Explain why other DBMSs are less suitable (or what the trade-offs are).

  * Compile a table (1 p.):

^ Task ID ^ Short name ^ Primary DBMS ^ Why primary (2–3) ^ Alternative 1 (how; when) ^ Alternative 2 (how; when) ^ Expected output ^ Freshness/latency ^ Access pattern ^
|  |  |  |  |  |  |  |  |  |

**Examples:**

  * For MongoDB:
    * “Find all users from country X who performed action Y over the last month.”
    * Aggregation with time filtering; counting by country/action.

  * For Cassandra:
    * “Retrieve all actions of user X for the last 7 days.”
    * Selections by key; aggregation by user and period.

  * For Redis:
    * “Find the number of active users on a given day.”
    * Counters and top lists.

  * For Neo4j:
    * “Find all users connected to course Z through a joint project.”
    * Search for connected users; compute centrality.

Submit to the BRUTE system:
  * HW1.docx file containing the table and per-task cards.

  * Deadline: **Sunday 26. 10. 2025** until 23:59. 

**[[https://docs.google.com/document/d/1vplZDXWyFZRLJ3sil6L-Nu2-IKGgrdxa1MDLIg62PdM|Tips for choosing a NoSQL system]]** (access from the university account)

**[[https://docs.google.com/spreadsheets/d/1vTpYBgM47OMI8o3d-pckz368TY57LyiewGg4Itgbic0|Example of the table]]** (access from the university account)