CloudByte Elastistor Product FAQs

Is it possible to scale-out using CloudByte ElastiStor?

Each CloudByte ElastiStor node can be scaled to 1 PB of raw storage capacity. You can linearly increase capacity and performance by adding additional ElastiStor nodes.

Can I use ElastiStor to improve the performance of storage solutions such as EMC Symmetrix or Hitachi Unified Storage?

Like other storage systems, CloudByte ElastiStor is an independent storage system with distinct architecture.

ElastiStor does not improve performance but shares the performance between competing applications granularly in a desired way. However, CloudByte recommends you to use raw disk for storage media rather than storage from other vendors.

How many flavors and versions of CloudByte ElastiStor are available in the market?

CloudByte ElastiStor 1.0 was the pioneering release of the product. The ongoing release is CloudByte ElastiStor 2.0 x

Which RAID levels are supported by CloudByte ElastiStor?

RAID5, RAID6, RAID10, RAID50, RAID60

Are there any CloudByte ElastiStor management plug-ins available?

Yes. The plug-ins for VMWare vCenter, Apache CloudStack and OpenStack Cinder are available off-the-shelf.

Can I use the same IP address for tenants?

Each tenant is identified by unique IP address.

Does ElastiStor support iPV6?

Current version of CloudByte ElastiStor does not have built in support for iPV6.

What is the skill set required to manage and configure ElastiStor?

Basic storage administration (SAN and NAS) and networking skills.

Provide ElastiStor specifications in terms of the supported number of logical table entries, for example, the maximum number of simultaneous tenant networks, maximum number of storage clients, maximum number of LUNs, maximum number of NFS mount points, etc.

ElastiStor does not have theoretical limitations on the number of Storage Volumes, VLANs and VSMs per Node as revealed in the tests done with 12000 Volumes. Also, ElastiStor supports unlimited snapshots and clones. For details, see ElastiStor Scalability

The CloudByte documentation (http://www.docs.cloudbyte.com/enabling-out-of-band-communication-between-nodes-in-an-ha-group/ ) refers to configuring IPMI between Nodes in an HA Group. Is such a configuration required for ElastiCenter HA also?

No. IPMI based out of band communication between peer Nodes is used during Node HA process when necessary. This configuration is not mandatory for ElastiCenter HA. However, it is helpful to have the IPMI configured for the regular remote access and troubleshooting.

Is SNMP monitoring support available on ElastiStor?

Yes.

Is SNMP based IOPS and capacity monitoring support available on ElastiStor?

SNMP support for volume statistics such as IOPS will be available in the future releases.

How to configure a spare disk?

Follow the procedures at the URL http://www.docs.cloudbyte.com/disk-replacement-scenarios/.

In pages where Graphs ought to appear, I see a message invalid data throughout ElastiCenter. Why?

Try using a different browser.
Adobe Flash is required to see the charts. For details, see http://www.docs.cloudbyte.com/wp-content/uploads/CloudByte_troubeshooting_invalid-data_graphs.pdf. Future releases will provide HTML5 support.

How to set up a secondary ElastiCenter manually?

This scenario applies if you haven’t configured ElastiCenter HA during installation. If ElastiCenter fails, you can promote the secondary ElastiCenter to primary ElastiCenter. For procedures, see Setting up secondary ElastiCenter

I encountered the error weak ephemeral Diffie-Hellman key while trying to access ElastiCenter. I am using Mozilla Firefox version 39 browser. Is there a workaround to access ElastiCenter?

Yes. Do the following to access ElastiCenter on Mozilla Firefox version 39:

  1. Launch Mozilla Firefox browser.
  2. In the Address bar, type the following:
    about:config
    .
  3. In the Search bar, search for the following parameter:
    security.ssl3.dhe_rsa_aes_128_sha
  4. Set the parameter to
    false (security.ssl3.dhe_rsa_aes_128_sha = false)
    by doing either of the following:
    • Right click the parameter and then select Toggle.
    • Double click the parameter.
  5. firefox_v39
  6. Repeat step 3 and step 4 for the parameter
    security.ssl3.dhe_rsa_aes_256_sha
  7. Open a new tab in the browser.
  8. Launch ElastiCenter.

I am unable to access ElastiCenter on the browser Chrome (version 45). Is there a workaround to access ElastiCenter?

If you are using Chrome version 45, do the following to ensure that ElastiCenter is compatible:

  1. SSH to ElastiCenter as root.
  2. Download the
    server.xml
    file from the following URL:
    http://cloudbyte.com/downloads/server.xml
  3. Backup the existing xml file in the location
    /usr/local/apache-tomcat-6.0.33/conf/server.xml
  4. Run the following command to replace the existing server.xml file with the new xml (that you downloaded):
    cp new_server.xml  /usr/local/apache-tomcat-6.0.33/conf/server.xml
  5. Run the following commands to restart Tomcat service:
    1. /usr/local/apache-tomcat-6.0.33/bin/shutdown.sh
    2. pgrep java
    3. (Optional, if the java service is running)
      pkill java
    4. /usr/local/apache-tomcat-6.0.33/bin/startup.sh
  6. Open a new tab in the browser.
  7. Launch ElastiCenter.

I cannot access the configuration file config.xml from ElastiCenter. How can I access it otherwise?

The following procedures let you manually restore a earlier file version to its original location:

  1. Move the Node to Maintenance mode. For details, see Bringing Node to Maintenance mode
  2. Run the following command to copy the latest config.xml file from the backup location: cp /var/backups/node/config.xml YYYY-MM-DD-HH-00-00 /cf/conf/config.xml.
  3. YYYY-MM-DD-HH-00-00 is the date and time when the file was backed up .

  4. Move the Node to available mode. For details, see Make a Node Available

Does ElastiStor supports NPIV?

No

What is API Key?

The API Key is used to authenticate the CloudByte REST API token requests. See, Using the REST APIs to obtain a Rest API Key.

How to retrieve scalability limitations of a SAS HBA?

You can retrieve the details using the command mpsutil show iocfacts. The following is a sample output:
sas-expanders