:original_name: en-us_topic_0054235821.html

.. _en-us_topic_0054235821:

FAQs
====

-  :ref:`Does DCS Support Common Redis Clients Such as Jedis? <en-us_topic_0054235822>`
-  :ref:`Should I Install Redis If I Already Have a DCS Instance? <en-us_topic_0054235823>`
-  :ref:`Do I Need to Enter a Password When Accessing a DCS Instance? Where Can I Obtain the Password? <en-us_topic_0066854411>`
-  :ref:`Does Standby Cache Node Remain Synchronized with Master Cache Node? <en-us_topic_0054235824>`
-  :ref:`Does DCS Support Data Persistence? <en-us_topic_0054235825>`
-  :ref:`Can DCS Be Accessed over Public Networks? <en-us_topic_0054235827>`
-  :ref:`Can I Modify Configuration Parameters of DCS Instances? <en-us_topic_0054235828>`
-  :ref:`Can I Recover Data from Deleted DCS Instances? <en-us_topic_0054235829>`
-  :ref:`What Is the Default Data Eviction Policy? <en-us_topic_0054235830>`
-  :ref:`What Should I Do If the Connection Between My Redis Client and the DCS Instance Times Out? <en-us_topic_0054235831>`
-  :ref:`Why Is Available Memory of Unused DCS Instances Less Than Total Memory? Why Is Memory Usage of Unused DCS Instances Greater Than Zero? <en-us_topic_0057984494>`
-  :ref:`Does DCS Support Data Read/Write in Multiple Databases? <en-us_topic_0071964265>`
-  :ref:`Why Can't I Back Up or Scale Up My DCS Instances? <en-us_topic_0072544388>`
-  :ref:`Do DCS Instances in Cluster Mode Support Native Redis Clusters? <en-us_topic_0072544389>`
-  :ref:`Why Do My DCS Instances Sometimes Become Unavailable While They Are in Running State? <en-us_topic_0077673452>`
-  :ref:`Why Is the Used Instance Memory Displayed on Cloud Eye Console Slightly Higher than the Instance Available Memory? <en-us_topic_0078401074>`
-  :ref:`How to Select and Configure a Security Group? <en-us_topic_0082605221>`
-  :ref:`Do DCS Instances Support Cross-VPC Access? <en-us_topic_0103202022>`

.. toctree::
   :maxdepth: 1
   :hidden: 

   does_dcs_support_common_redis_clients_such_as_jedis
   should_i_install_redis_if_i_already_have_a_dcs_instance
   do_i_need_to_enter_a_password_when_accessing_a_dcs_instance_where_can_i_obtain_the_password
   does_standby_cache_node_remain_synchronized_with_master_cache_node
   does_dcs_support_data_persistence
   can_dcs_be_accessed_over_public_networks
   can_i_modify_configuration_parameters_of_dcs_instances
   can_i_recover_data_from_deleted_dcs_instances
   what_is_the_default_data_eviction_policy
   what_should_i_do_if_the_connection_between_my_redis_client_and_the_dcs_instance_times_out
   why_is_available_memory_of_unused_dcs_instances_less_than_total_memory_why_is_memory_usage_of_unused_dcs_instances_greater_than_zero
   does_dcs_support_data_read_write_in_multiple_databases
   why_cant_i_back_up_or_scale_up_my_dcs_instances
   do_dcs_instances_in_cluster_mode_support_native_redis_clusters
   why_do_my_dcs_instances_sometimes_become_unavailable_while_they_are_in_running_state
   why_is_the_used_instance_memory_displayed_on_cloud_eye_console_slightly_higher_than_the_instance_available_memory
   how_to_select_and_configure_a_security_group
   do_dcs_instances_support_cross-vpc_access