November 2021
Intermediate to advanced
410 pages
12h 1m
Chinese
Content preview from MongoDB权威指南（第3版）
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分片管理
｜
283
> db.changelog.find({what: "moveChunk.from", "details.max.imdbId":
NumberLong("-7262221363006655132")}).pretty()
{
"_id" : "router1-2018-11-04T17:29:39.753-0500-5bdf72d321b6e3be02fabf0b",
"server" : "bob",
"clientAddr" : "127.0.0.1:64743",
"time" : ISODate("2018-11-04T22:29:39.753Z"),
"what" : "moveChunk.from",
"ns" : "video.movies",
"details" : {
"min" : {
"imdbId" : { "$minKey" : 1 }
},
"max" : {
"imdbId" : NumberLong("-7262221363006655132")
},
"step 1 of 6" : 0,
"step 2 of 6" : 4,
"step 3 of 6" : 191,
"step 4 of 6" : 17000,
"step 5 of 6" : 341,
"step 6 of 6" : 39,
"to" : "shard01",
"from" : "shard02",
"note" ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.