ttl

Is there anyway to create a Redis database where keys HAVE TO expire after a certain time? I know I can expire an individual key using the EXPIRE command but since I am expiring every key after a certain time anyways, it would be nice to have this behavior specified in the Redis config file. No, Redis (up to and including v3.2) does not provide the means for automatically setting the TTL of newly-created keys. You have to set it explicitly for each key you create. 来源： https://stackoverflow.com/questions/37121373/redis-database-ttl

I want to know if it's possible to use TTL on nested documents. Scenario I have Account and inside I have Sessions . Sessions need to expire in 30 minutes. I've set everything up but obviously when I set TTL index on Account.Sessions.EndDateTime it removes the whole Account . Can I make sure it removes only Session ? This is what it looks like in database. Notice how it will delete whole Account and not only Session when EndDateTime will come. { "_id" : ObjectId("53af273888dba003f429540b"), "Email" : "steve@s3te5ve.com", "PasswordHash" : "CZaBEQRbwWNgJBjyhks7gH0Z3v5ZvDkW29pryF0DEXyE8rIw0NA4x39

How to set TTL (Time to Live) for a specific couchbase document using spring-data-couchbase? I know there is way to set expiry time using Document notation as follows @Document(expiry = 10) http://docs.spring.io/spring-data/couchbase/docs/1.1.1.RELEASE/reference/html/couchbase.entity.html It will set TTL for all the documents save through the Entity class. But it seems there is way to set expiration(TTL) time for a specific document "Get and touch: Fetch a specified document and update the document expiration." mentioned in http://docs.couchbase.com/developer/dev-guide-3.0/read-write.html How

I have a very certain thing i want to accomplish, and I wanted to make sure it is not possible in mongoose/mongoDB before I go and code the whole thing myself. I checked mongoose-ttl for nodejs and several forums and didn't find quite what I need. here it is: I have a schema with a date field createDate. Now i wish to place a TTL on that field, so far so good, i can do it like so (expiration in 5000 seconds): createDate: {type: Date, default: Date.now, expires: 5000} but I would like my users to be able to "up vote" documents they like so those documents will get a longer period of time to

I know that there are TTLs on columns in Cassandra. But is it also possible to set a TTL on a row? Setting a TTL on each column doesn't solve my problem as can be seen in the following usecase: At some point a process wants to delete a complete row with a TTL (let's say row "A" with TTL 1 week). It could do this by replacing all existing columns with the same content but with a TTL of 1 week. But there may be another process running concurrently on that row "A" which inserts new columns or replaces existing ones without a TTL because that process can't know that the row is to be deleted (it

Is there any way to set some sort of "expiry" time on data entries in PostgreSQL ? I'm thinking about something equivalent to EXPIRE in Redis . I'm not looking to store a timestamp and then manually code some sort of cron job to check what entries have expired. I'm trying to find out if there's any native feature in PostgreSQL that would provide this kind of functionality, or if it would make sense to request such feature for future releases. There is no built in expiration feature but if your goal is to automatically expire fields and have the logic contained within your database (and thus no

ping [root@51cto /]# ping www.baidu.com PING www.a.shifen.com (61.135.169.121) 56(84) bytes of data. 64 bytes from 61.135.169.121: icmp_seq=1 ttl=128 time=71.7 ms 64 bytes from 61.135.169.121: icmp_seq=2 ttl=128 time=72.1 ms 64 bytes from 61.135.169.121: icmp_seq=3 ttl=128 time=133 ms 64 bytes from 61.135.169.121: icmp_seq=4 ttl=128 time=119 ms ^C --- www.a.shifen.com ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3676ms rtt min/avg/max/mdev = 71.735/99.181/133.310/27.659 ms 与Windows环境下ping不同，Linux环境下，如果不按Ctrl+C会一直ping下去。Windows ping只发4个数据包完事。 ttl生存时间，每过一个路由器ttl减一