{"action":"created","issue":{"url":"https://api.github.com/repos/paritytech/parity/issues/8188","repository_url":"https://api.github.com/repos/paritytech/parity","labels_url":"https://api.github.com/repos/paritytech/parity/issues/8188/labels{/name}","comments_url":"https://api.github.com/repos/paritytech/parity/issues/8188/comments","events_url":"https://api.github.com/repos/paritytech/parity/issues/8188/events","html_url":"https://github.com/paritytech/parity/issues/8188","id":307496294,"number":8188,"title":"One question of JournalDB","user":{"login":"EighteenZi","id":31607114,"avatar_url":"https://avatars3.githubusercontent.com/u/31607114?v=4","gravatar_id":"","url":"https://api.github.com/users/EighteenZi","html_url":"https://github.com/EighteenZi","followers_url":"https://api.github.com/users/EighteenZi/followers","following_url":"https://api.github.com/users/EighteenZi/following{/other_user}","gists_url":"https://api.github.com/users/EighteenZi/gists{/gist_id}","starred_url":"https://api.github.com/users/EighteenZi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/EighteenZi/subscriptions","organizations_url":"https://api.github.com/users/EighteenZi/orgs","repos_url":"https://api.github.com/users/EighteenZi/repos","events_url":"https://api.github.com/users/EighteenZi/events{/privacy}","received_events_url":"https://api.github.com/users/EighteenZi/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2018-03-22T03:46:54Z","updated_at":"2018-03-22T06:21:34Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"_Before filing a new issue, please **provide the following information**._\r\n\r\n> I'm running:\r\n>\r\n> - **Which Parity version?**: newest\r\n> - **Which operating system?**:  Linux\r\n> - **How installed?**: from source\r\n> - **Are you fully synchronized?**:  yes\r\n> - **Which network are you connected to?**: ethereum \r\n> - **Did you try to restart the node?**:  yes\r\n\r\n_Your issue description goes here below. Try to include **actual** vs. **expected behavior** and **steps to reproduce** the issue._\r\n\r\nI read the JournalDB many times, and still confused.\r\n\r\n1. Why do we need JournalDB?   Add some overlays to speed up some actions like 'get'?\r\n If so, the StateDB's global cache will do the same work, too.\r\n\r\n2. What does the word 'journal' mean? Does it have the same meaning of 'record' in this place? Or means 'something is temporary'?  I cannot get it very clearly.\r\n\r\nWould somebody help me?\r\nThanks very much.\r\n"},"comment":{"url":"https://api.github.com/repos/paritytech/parity/issues/comments/375192584","html_url":"https://github.com/paritytech/parity/issues/8188#issuecomment-375192584","issue_url":"https://api.github.com/repos/paritytech/parity/issues/8188","id":375192584,"user":{"login":"EighteenZi","id":31607114,"avatar_url":"https://avatars3.githubusercontent.com/u/31607114?v=4","gravatar_id":"","url":"https://api.github.com/users/EighteenZi","html_url":"https://github.com/EighteenZi","followers_url":"https://api.github.com/users/EighteenZi/followers","following_url":"https://api.github.com/users/EighteenZi/following{/other_user}","gists_url":"https://api.github.com/users/EighteenZi/gists{/gist_id}","starred_url":"https://api.github.com/users/EighteenZi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/EighteenZi/subscriptions","organizations_url":"https://api.github.com/users/EighteenZi/orgs","repos_url":"https://api.github.com/users/EighteenZi/repos","events_url":"https://api.github.com/users/EighteenZi/events{/privacy}","received_events_url":"https://api.github.com/users/EighteenZi/received_events","type":"User","site_admin":false},"created_at":"2018-03-22T06:21:34Z","updated_at":"2018-03-22T06:21:34Z","author_association":"CONTRIBUTOR","body":"The OverlayRecentDB will reduce the times of operations, such as insertions and deletions,  to the KVDB. "}}
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