EMFILE: Error with large number of db

[Koldunz]

Hello,
Thanks for the great work on nodejs packages mongodb-backup and restore. I'm currently using these two packages in my project.

I have some problems with large number of db. I try backup 100+ db in async.series. But I have error:
fs.js:60 throw err; // Forgot a callback but don't know where? Use NODE_DEBUG=fs ^ Error: EMFILE: too many open files, open '/var/www/test/node_modules/mongodb-backup/dump/db_1/pages/577bc802fed786f67fdc43b3.bson' at Error (native)

The size of each base about 100 mb
Could you please have a look at it ?

Thanks in advance.

[hex7c0]

hey Koldunz,
which version do you use?

[Koldunz]

Nodejs v4.4.6
Npm v2.15.5
mongodb-backup v1.6.0

[hex7c0]

you should raise ulimit -n 4096

next release I'll use https://github.com/isaacs/node-graceful-fs

[Koldunz]

Thank you. I'll wait for the update

[hex7c0]

published https://github.com/hex7c0/mongodb-backup/releases/tag/1.6.1