distributed-database

"found" by the @discordapp troops the hard way: https://status.discordapp.com/incidents/62gt9cgjwdgf
pinging @zorkian who pointed it out to me.

trivial to repro, this is against a 3.3.13 on fedora-31.

$ etcdctl set /baa schnorp
$ etcdctl get /baa
schnorp
$ echo -ne 'PUT /v2/keys/baa HTTP/1.1\r\nHost: boo\r\nContent-Length: 123\r\n\r\n' | nc localhost 2379
HTTP/1.1 200 OK
...
$ et

You may try to analyze first and spawn more subtasks on demand (no strict) instead of one big PR handle the whole package which is hard to review.

Describe the solution you'd like
Ability to export to Apache Parquet format.

EXPORT INTO PARQUET
  'azure://acme-co/customer-export-data?AZURE_ACCOUNT_KEY=hash&AZURE_ACCOUNT_NAME=acme-co'
   FROM TABLE bank.customers;

Describe alternatives you've considered
Using CSV format

Additional context
Parquet stores the file sc

fdbcli flags currently contain a mixture of _ and - (probably for historic reasons). I would propose to unify the flags and only use either _ or - personally I tend to hyphens like recommended in the POSXI standard (https://www.gnu.org/software/libc/manual/html_node/Argument-Syntax.html). Current fdbcli help output:

FoundationDB CLI 6.2 (v6.2.29)
usage: /usr/bin/fdb/6.2/fdbcli

Hello Philip!
I think there is an issue with this part of the code of rqlite (store/store.go).

func (s *Store) Database(leader bool) ([]byte, error) {
	if leader && s.raft.State() != raft.Leader {
		return nil, ErrNotLeader
	}
	// Ensure only one snapshot can take place at once, and block all queries.
	s.mu.Lock()
	defer s.mu.Unlock()

	f, err := ioutil.TempFile("", "rqlilte-snap-

When pausing a universe, user has to click the Yes button instead of the expected enter key to submit this form.

This leads to universes left running.

version 2.7.1

Currently we are able to map schemas and tables using file based mapping. This is great as it makes it possible to handle the case where schemas and tables names differ with casing only. However we do not support this for columns yet. So in case user has a table where two column names differs with casing only (like column A and a) we are not able to read it.

See `io.trino.plugin.jdbc.mappin

Use case:

1.) A user may want to backup all tables but no metadata like users, privileges, etc. without explicitly defining each table inside the CREATE SNAPSHOT statement.

2.) A user may want to transfer users & privileges, custom analyzers or user-defined-functions from one cluster to another without backing up a complete cluster including all data (tables).

*Feature description

Currently we don't have any mechanism to limit the maximum number of clients that could be handled simultaneously.

This feature should be designed properly. Here is some clue: https://redis.io/topics/clients#maximum-number-of-clients

Now that we support more than 1 data type, we should include the values data type in cache nodes. This give us a way of easily identifying what type of data a key points to e.g. string, queue (and more types in the future)

Currently a cache node object consists of a Key, a Value and a TTL. We should also add a field specifying the type of the Value