search for: ndb

hello , I am new user in R . I have datafile (class = data.frame) which has 825 columns with unique column name i want extract 200 selected column from datafile how can I do this? my datafile look like.. Mi RBN RBF nDB nX 3 2.6225979 0.53132756 -0.80599902 -1.4471864 -0.5705269 10 0.4818746 -1.72143092 -2.19579027 2.0118824 -0.5705269 12 2.8519611 1.88298265 0.09614617 0.6282549 -0.5705269 20 0.6347834 -0.36977583 0.63255683 1.3200687 -0.5705269 I want to extract data with unique name of col...

Does Red Hat make available spec files for future releases? I took the existing mysql 5.0 spec file and, with a few mods here and there, was able to build the 5.1 rpm. But there are some new things which I am curious how they will deal with (ndb stuff, primarily), and was wondering if they have available the "beta" SRPMs or spec files for future versions of software. johnn

On Tue, Apr 10, 2018 at 03:25:47PM +0000, Nir Soffer wrote: > On Tue, Apr 10, 2018 at 5:50 PM Richard W.M. Jones <rjones@redhat.com> > wrote: > > > On Tue, Apr 10, 2018 at 02:07:33PM +0000, Nir Soffer wrote: > > > This makes sense if the device is backed by a block device on oVirt side, > > > and the NBD support efficient zeroing. But in this case the device

...ut earlier on that it might be easier if imageio >> > just exposed NBD, or if we found a way to tunnel NBD requests over web >> sockets (in the format case nbdkit would not be needed, in the latter >> case nbdkit could act as a bridge). > > I think we can expose NBD using ndb-server and dynamic exports. It can work like this: 0. Install nbd and enable nbd-server on a host, running as vdsm:kvm, not exporting anything. 1. User starts transfer session via oVirt API with protocol="nbd" (if not specified, use "https" for backward compatibility)...

Could someone please elaborate on the technical differences and practical impact of whether choosing memory-based tables in MySQL or using memcached. I got this far on my own: It seems that MySQL uses the NDB engine for transaction-safe memory access in a cluster. the memory storage engine seems to be faster but not synchronizable by any means in a cluster. memcached seems to be ultimately fast but requires extra effort in your code. Who got experience on that? Best regards Peter

im trying to deploy my app on our staging server and am running into an issue. we have a MySQL NDB cluster for the staging box. this basically means that the staging box should be able to use MySQL via localhost and it will automatically know it''s in a cluster. When running queries, it will go out to the real DB boxes instead of localhost to fetch the data. AFAIK, the clustering setup...

...awhile now. Can't seem to get the right mix. Does anyone see this same problem with older versions or the v2.0.7 version. [2001/03/13 10:43:26, 0] smbd/oplock.c:(973) oplock_break: receive_smb timed out after 30 seconds. oplock_break failed for file Account Services/customer files (ATS NDB)/FLUGBEREITSCHAFT/FLUGEREITSCHAFT 0103 inv.doc (dev = 40110004, inode = 172699). [2001/03/13 10:43:26, 0] smbd/oplock.c:(1048) oplock_break: client failure in oplock break in file Account Services/customer files (ATS NDB)/FLUGBEREITSCHAFT/FLUGEREITSCHAFT 0103 inv.doc...

...t when you move lot of data around. Exposing NBD using the same authentication mechanism can be interesting, but only if clients have an easy way to use this. Will this allow client (e.g. backup vender) to download and upload images using qemu-img? qemu-img <- nbd-> ovirt-imageio <- ndb -> qemu/ndb-server We also need streaming support - with http you can stream the data from anywhere, while qemu-img needs a file. I don't think that backup vendors or users will be happy to implement nbdkit plugins. If qemu-img would support input and ouptut from stdin/stdout instead of fi...

On Thu, Apr 12, 2018 at 09:22:16AM +0000, Nir Soffer wrote: > I think we can expose NBD using ndb-server and dynamic exports. > It can work like this: > > 0. Install nbd and enable nbd-server on a host, running > as vdsm:kvm, not exporting anything. > > 1. User starts transfer session via oVirt API with protocol="nbd" > (if not specified, use "https&...

Hi, I've noticed that Oracle is charging for the MySQL version that supports InnoDB (http://www.mysql.com/products/). I could not find any other link with direct confirmation of what is going to change for the existing servers/versions and I was wondering if anybody has a more detailed info. For example, is RHEL (and CentOS) going to drop support for it? Are we going to see any further

I've been bashing my head into a wall the past few days on this. I am trying to setup a Load Balanced MySQL Cluster. I can get the MySQL NDB Clusters working, but when I try to install the HA Load Balancers, I can't get past the step of the shared Virtual IP. I'm basing my sequence on HowToForge Guide written for Debain (http://www.howtoforge.com/loadbalanced_mysql_cluster_debian_p7). I've added my own tweaks and use the a...

...ll-centers contact directly the upstream SIP providers. Asterisk server must also record the call and, maybe, do some transcoding. The single asterisks instances talk each-other with DUNDi/IAX2 to pass the calls from an op to another op registered on another server. We'll use a mysql database (NDB cluster) to avoid to have multiple sip.conf files with the registration informations (asterisk-rt). We must, in any case, use asterisk, because the whole call-center has to be integrated with a 3rd part software for predictive calling ad power dialing which has been developed for asterisk. The SIP...

Hi, I have a User model, with a validates_uniqueness_of :login The generated SQL for the validation is: SELECT * FROM `users` WHERE (LOWER(users.login) = ''fernando'' AND users.id <> 10001) LIMIT 1; and it takes 0.13s to happen (my table has 10.000 rows) When I use the EXPLAIN instruction on it, it shows that it will use the primary_key as index, but this is not

On Tue, Apr 09, 2013 at 10:18:50AM -0400, Skippy VonDrake wrote: > Hello, > > Apologies upfront if posting to this list is inappropriate. > > I have an app that forks a process with calls qemu-nbd with an offset > into an image. > The app then uses libguestfs to attach the nbd device. > But it appears that qemu is failing. When you say "qemu is failing", do you

I've been researching the state of 'file alteration monitoring' technology on Linux. Famd uses dnotify to inefficently monitor a handful of directories. The replacement for dnotify is being worked on in the kenel and it's called inotify. If I understand it correctly and they get it finished, it would be an awesome addition to rsync. With it, you could run rsync to update a

...ost/tickets/test Finally we need to create the target image: qemu-img create -f raw /var/tmp/test.raw 512m With this we can run virt-v2v, and since we use a real server, we can check that the image was imported correctly: qemu-img compare overlay.qcow2 /var/tmp/test.raw To test imageio ndb support, need to import to qcow2 disks, we need to install the nbd ticket: $ curl --unix-socket ovirt-imageio/daemon/test/daemon.sock \ -X PUT \ --upload-file tests/test-v2v-o-rhv-upload-module/nbd.json \ http://localhost/tickets/test Now we can create qcow2 target ima...

Hello: We will be setting up MySQL replication for a load balanced environment, but we have to separate reads and writes. How can we modify rails to do so? Has anyone done this already? Thank you in advance! Dan -- Posted via http://www.ruby-forum.com/.

Hi, I am setting up a xen 3 enviroment that has a file backend and 2 application servers with live emegration between the 2 application servers. --------- --------- | app 1 | | app 2 | --------- --------- \ / \ / \ / ---------------- | file backend | ---------------- I am planing on using lustre clustre file system on the file backend. Are there

We can use now ImageioClient to communicate with ovirt-imageio server on oVirt host. Using the client greatly simplifies the plugin, and enables new features like transparent proxy support. The client will use transfer_url if possible, or fall back to proxy_url. Since the client implements the buffer protocol, move to version 2 of the API for more efficient pread(). Another advantage the client

I''m doing a fotolog for a company. It''s expected to manage about 100k of connections per day and about 1500 concurrents connections. What hardware should I buy to manage those numbers of connections? I''m planning to use slackware + lighttpd + fastcgi, but perhaps we will have to reuse some scripts in php, in that case I would use slackware + apache + mod_php + fastcgi