1/3/2024 0 Comments Reset syncovery trial![]() If you are wondering how to setup a NDB Cluster, then please look into my previous blog here. To demonstrate this feature, let’s create a NDB Cluster with below environment. Let’s look at NDB Cluster backup and restore feature through an example: The CTL file is used to restore the schema, the DATA file is used to restore most of the data, and the LOG file is used to ensure snapshot consistency. At the end of a backup, each data node has recorded a set of files (*.data, *.ctl, *.log), each containing a subset of cluster data.ĭuring restore, each set of files will be restored to bring the cluster to the snapshot state. Data is distributed across all the data nodes, and the backup occurs in parallel across all nodes, so that all data in the cluster is captured. The scanning and logging are synchronised so that the backup is a snapshot at a single point in time. At the same time, a log of ongoing changes is also recorded. When a backup starts, each data node scans the set of table partitions it owns, writing their records to its local disk. At any time, each partition is logically owned by just one node in one nodegroup, which is responsible for including it in a backup. Different nodegroups contain different sets of partitions. ![]() All data nodes in a nodegroup (up to four) contain the same sets of partitions, kept in sync at all times. The data nodes are logically grouped into nodegroups. In NDB Cluster, tables are horizontally partitioned into a set of partitions, which are then distributed across the data nodes in the cluster. Neuroplasticity Neurorehabilitation Repetitive sensory stimulation Sensorimotor Stroke.NDB Cluster Backup & Restore concept in brief: The trial was retrospectively registered Januunder DRKS00003515 ( jsessionid=AEE2585CCB82A22A2B285470B37C47C8?navigationId=results ). Rehabilitation outcome between the effects of RSS and standard therapy was largest for sensory and motor improvement however, the results for proprioception and everyday tasks were encouraging warranting further studies in more severe patients. Rehabilitation including RSS enhanced sensorimotor recovery more effectively than standard therapy alone. Repetitive sensory stimulation was well tolerated and accepted, and no adverse events were observed. After 2 weeks of the intervention, patients in the group receiving standard therapy with RSS showed significantly better restored sensorimotor function than the control group (standardized mean difference 0.57 95% CI -0.013-1.16 p = 0.027) RSS treatment was superior in all domains tested. Before treatment, sensorimotor performance between groups was balanced (p = 0.237). Data of 25 patients were not completed because they were transferred to another hospital, resulting in n = 23 for each group. Seventy one eligible patients were enrolled and randomly assigned to receive RSS treatment (n = 35) or sham RSS (n = 36). In addition, tolerability and side effects of RSS intervention were recorded. Data from these quantitative tests were combined into a total performance index serving as primary outcome measure. Before and after the intervention, we assessed light-touch and tactile discrimination, proprioception, dexterity, grip force, and subtasks of the Jebsen Taylor hand-function test for the non-affected and the affected hand. RSS consisted of intermittent 20 Hz electrical stimulation applied on the affected hand for 45 min/day, 5 days per week, for 2 weeks, and was transmitted using custom-made stimulation-gloves with built-in electrodes contacting each fingertip separately. Patients were masked to treatment allocation. Patients with subacute unilateral ischemic stroke were randomly assigned to receive standard therapy in combination with RSS or with sham RSS. Here, we investigated whether RSS reduces sensorimotor upper limb impairment in patients with subacute stroke more effectively than conventional therapy.Ī single-blinded sham-controlled clinical trial assessed the effectiveness of RSS in treating sensorimotor deficits of the upper limbs. In healthy subjects, RSS leads to widespread sensorimotor cortical reorganization paralleled by improved sensorimotor behavior. Repetitive sensory stimulation (RSS) adapts the timing of stimulation protocols used in cellular studies to induce synaptic plasticity.
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