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Diffstat (limited to 'docs/misc/sync.rst')
| -rw-r--r-- | docs/misc/sync.rst | 35 |
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diff --git a/docs/misc/sync.rst b/docs/misc/sync.rst new file mode 100644 index 00000000..b9d4c858 --- /dev/null +++ b/docs/misc/sync.rst @@ -0,0 +1,35 @@ +Soledad sync process +==================== + +TODO: this documentation needs to be updated to account for new streaming encryption method. + +Phases of sync: + +1. client acquires knowledge about server state. +2. client sends its documents to the server. +3. client downloads documents from the server. +4. client records its new state on the server. + +Originally in u1db: + +* **1** is a GET, +* **2** and **3** are one POST (send in body, receive in response), +* **4** is a PUT. + +In soledad: + +* **1** is a GET. +* **2** is either 1 or a series of sequential POSTS. + * **2.1** encrypt asynchronously + * **2.2** store in temp sync db + * **2.3** upload sequentially +* **3** is a series of concurrent POSTS, insert sequentially on local client db. + * **3.1** download concurrently + * **3.2** store in temp sync db + * **3.3** decrypt asynchronously + * **3.4** insert sequentially in local client db +* **4** is a PUT. + +This difference between u1db and soledad was made in order to be able to gracefully interrupt the sync in the middle of the upload or the download. + +it is essential that all the uploads and downloads are sequential: documents must be added in order. the download happens in parallel, but then locally they are added sequentially to the local db. |